Weakness (CWE)
CWE-79: Cross-site Scripting
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
How to prevent it (8 mitigations)
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Architecture and Design
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
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Implementation, Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
- HTML body
- Element attributes (such as src="XYZ")
- URIs
- JavaScript sections
- Cascading Style Sheets and style property
etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
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Architecture and Design, Implementation
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
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Implementation
Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
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Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
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Implementation
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
Source: MITRE CWE-79
21,906 results · Clear filters · Feed
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Medium 6.5
WordPress Panorama Viewer – 360 Degree Image + Video Viewer plugin <= 1.8.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Panorama Viewer – 360 Degree Image + Video Viewer panorama allows Stored XSS.This issue affects Panorama Viewer – 360 Degree Image + Video Viewer: f…
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Medium 6.5
WordPress B Slider plugin <= 2.2.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins B Slider b-slider allows Stored XSS.This issue affects B Slider: from n/a through 2.2.2.
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Medium 6.5
WordPress JetElements For Elementor plugin <= 2.9.2.5 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Crocoblock JetElements For Elementor jet-elements allows Stored XSS.This issue affects JetElements For Elementor: from n/a through 2.9.2.5.
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Medium 6.5
WordPress Geo Mashup plugin <= 1.13.22 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Dylan Kuhn Geo Mashup geo-mashup allows Stored XSS.This issue affects Geo Mashup: from n/a through 1.13.22.
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Medium 6.5
WordPress Better Post & Filter Widgets for Elementor plugin <= 1.9.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Smart Widgets Better Post & Filter Widgets for Elementor better-post-filter-widgets-for-elementor allows Stored XSS.This issue affects Better Post & Filte…
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Medium 6.5
WordPress Lazy Load for Videos plugin <= 2.18.11 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kevin Weber Lazy Load for Videos lazy-load-for-videos allows Stored XSS.This issue affects Lazy Load for Videos: from n/a through 2.18.11.
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Medium 6.5
WordPress Ad Inserter plugin <= 2.8.18 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Igor Funa Ad Inserter ad-inserter allows Reflected XSS.This issue affects Ad Inserter: from n/a through 2.8.18.
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Medium 6.5
WordPress Royal Elementor Addons plugin <= 1.7.1069 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WProyal Royal Elementor Addons royal-elementor-addons allows Stored XSS.This issue affects Royal Elementor Addons: from n/a through 1.7.1069.
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Medium 6.5
WordPress Royal Elementor Addons plugin <= 1.7.1069 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WProyal Royal Elementor Addons royal-elementor-addons allows DOM-Based XSS.This issue affects Royal Elementor Addons: from n/a through 1.7.1069.
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Medium 6.5
WordPress Gutenberg Blocks by Kadence Blocks plugin <= 3.8.0.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks kadence-blocks allows Stored XSS.This issue affects Gutenberg Blocks by Kadence Blocks: from n/a th…
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Medium 6.5
WordPress Image Gallery block – Create and display photo gallery/photo album. plugin <= 2.4.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Image Gallery block – Create and display photo gallery/photo album. 3d-image-gallery allows Stored XSS.This issue affects Image Gallery block – Crea…
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Medium 5.1
Reflected Cross-Site Scripting in software IsMyGym by Zuinq Studio
Reflected Cross-Site Scripting (XSS) in Gym Management Software IsMyGym by Zuinq Studio affecting the reservation endpoint where the 'ret' parameter is reflected in the HTTP response without any proper sanitization. Successfull explotation of this vulnerabili…
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Medium 5.1
Reflected cross-site scripting in the video library of the Regional Parliament of Castile-La Mancha
A reflected Cross-Site Scripting (XSS) vulnerability has been identified in the web application of the Castile-La Mancha Regional Parliament’s video library. The application embeds user-supplied content into the page without properly sanitising it before it i…
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Medium 5.6
Multiple cross-site scripting (XSS) in OPNsense
Multiple cross site scripting (XSS) vulnerabilities affect OPNsense firewall vesrion 26.7.1_1 and earlier allows low privileged attacker to execute Javascript in the context of another user visiting a specific page or clicking on a specifically crafted link.
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Medium 4.3
CloudClassroom-PHP-Project addnewstudent.php cross site scripting
A security vulnerability has been detected in CloudClassroom-PHP-Project. This affects an unknown part of the file addnewstudent.php. Such manipulation of the argument fname leads to cross site scripting. The attack may be launched remotely. The exploit has b…
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Medium 6.4
YesWiki 4.2.0 before 4.7.0 Stored XSS via Comment Raw-HTML Syntax
YesWiki from 4.2.0 before 4.7.0 contains a stored cross-site scripting vulnerability that allows authenticated users to inject script into comment bodies using the wakka raw-HTML syntax. Attackers can post comments via the /api/comments endpoint that render u…
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Medium 6.1
YesWiki before 4.7.0 Stored XSS via filtertags Action Parameters
YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability in the filtertags action, which echoes attacker-controlled token values without output encoding. Anonymous attackers can inject markup via action-attribute parameters that bypasses the …
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Medium 5.4
YesWiki before 4.7.0 Stored XSS via ImageField SVG Upload
YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability that allows low-privilege authenticated users to upload unsanitized SVG files through the bazar ImageField class. Attackers can submit a malicious SVG via the image field of the entries…
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Medium 5.4
SiYuan 2.10.0 before 3.8.7 Stored XSS via KaTeX \href in Math Blocks
SiYuan from 2.10.0 before 3.8.7 contains a stored cross-site scripting vulnerability that allows users with edit permission to inject script by placing javascript: URLs in math block content rendered with KaTeX trust enabled. Attackers can store \href, \url, …
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Medium 6.8CVE-2026-116167 Scanner template
SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter
SiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-auth page that assigns the to parameter to window.location.href without scheme validation. Attackers can send a crafted link with a javascript: URI that…
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Medium 5.4
WWBN AVideo 26.0 through 29.3.0 Stored XSS via Comment Markdown Rendering
WWBN AVideo 26.0 through 29.3.0 contains a stored cross-site scripting vulnerability that allows authenticated commenters to inject JavaScript because markDownToHTML() preserves event-handler attributes in leading HTML blocks. Attackers can post a comment sta…
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Medium 4.3
Privoce Vocechat Query Parameter widget.html cross site scripting
A vulnerability has been found in Privoce Vocechat up to 0.9.121. This issue affects some unknown processing of the file widget.html of the component Query Parameter Handler. Such manipulation of the argument welcome leads to cross site scripting. The attack …
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Medium 6.8
GiveWP < 4.19.0.1 - Give Worker+ Stored XSS via Form Template Primary Color
The GiveWP WordPress plugin before 4.19.0.1 does not properly sanitise and escape one of its donation form template settings before outputting it inside an HTML attribute, allowing users with a custom form-editing GiveWP WordPress plugin before 4.19.0.1 role …
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Medium 4.3
phpIPAM Rack Link Creation show-rack-popup.php create_rack_link cross site scripting
A vulnerability was detected in phpIPAM up to 1.8.3. Affected by this issue is the function create_rack_link of the file app/tools/racks/show-rack-popup.php of the component Rack Link Creation. Performing a manipulation of the argument deviceid results in cro…
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Medium 6.5
WordPress Ad Inserter plugin <= 2.8.18 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Igor Funa Ad Inserter ad-inserter allows Reflected XSS.This issue affects Ad Inserter: from n/a through 2.8.18.
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Medium 6.8
Stored XSS in the “Notes” field of project checklists
Stored XSS vulnerability in the “Notes” field of the Checklists in Cervantes version v1.3-beta could allow an attacker to execute arbitrary code in another user's browser with elevated privileges
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Medium 6.5
WordPress All-in-One Video Gallery plugin <= 4.9.7 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Plugins360 Labs All-in-One Video Gallery all-in-one-video-gallery allows Stored XSS.This issue affects All-in-One Video Gallery: from n/a through 4.9.7.
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Medium 6.8
WP VR 8.5.49 - 9.0.2 - Contributor+ Stored XSS via Hotspot Content
The WPVR WordPress plugin before 9.0.3 does not properly sanitise and escape some of its tour hotspot content before storing it and outputting it on the front end, which could allow users with the Contributor role and above to perform Stored Cross-Site Script…
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Medium 6.8
GeoDirectory < 2.8.194 - Contributor+ Stored XSS via gd_map Shortcode width Attribute
The GeoDirectory WordPress plugin before 2.8.194 does not sanitise and escape some of its map shortcode attributes before outputting them within a style attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attac…
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Medium 6.8
Pixel Tag Manager for WooCommerce < 2.2.3 - Contributor+ Stored XSS via Google Tag Manager Container ID
The Pixel Tag Manager for WooCommerce WordPress plugin before 2.2.3 does not perform a capability check in one of its AJAX actions, and exposes the nonce protecting it to any user able to access the admin dashboard, allowing users with a role as low as Contri…
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Medium 6.1
odf-kit has HTML injection leading to XSS in odsToHtml() via unescaped style attribute values
### Summary ODF style values are interpolated into `style="..."` attributes without HTML-escaping in odf-kit's ODS to-HTML renderer (`odsToHtml()`). A double-quote character inside an attacker-controlled style value breaks out of the attribute, allowing arbit…
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Medium 5.4
GFI Archiver < 15.14 Stored XSS via MailInsights.aspx
GFI Archiver before 15.14 contains a stored cross-site scripting vulnerability in the MailInsights scheduled report configuration that allows authenticated attackers to inject arbitrary web script or HTML via the report name parameter to /Archiver/MailInsight…
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Medium 6.1
Zimbra Collaboration Suite Pre-Authentication Reflected Cross-Site Scripting via Login Page zrememberme Parameter
A reflected cross-site scripting vulnerability in the login page of Zimbra Collaboration Suite (ZCS) allows an unauthenticated attacker to execute JavaScript through the zrememberme parameter. A crafted relogin URL selects a two-factor error display that inse…
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Medium 5.4
Zimbra Collaboration Suite Briefcase CSS Sanitization Bypass via Non-ASCII Stylesheet Characters
A CSS sanitization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user with Briefcase access to publish a document that displays attacker-controlled content under the Zimbra origin. When processing a stylesheet containing non-ASCII …
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Medium 4.7
serialize-javascript 7.0.1 before 7.1.3 XSS via unescaped </script in function body
serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped </script. Attackers controlling a function's sour…
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Medium 4.6
conda-forge.org: Stored DOM XSS via unsanitized dangerouslySetInnerHTML in the status dashboard
conda-forge is a GitHub organization containing repositories of conda recipes. In commits 85748ad2368a and prior, two React components render externally-sourced strings directly as HTML using dangerouslySetInnerHTML, with no sanitization (the project has no D…
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Medium 5.1
Reflected Cross-Site Scripting (XSS) in CGM CLININET
CGM CLININET is vulnerable to Reflected Cross-Site Scripting (XSS) due to improper neutralization of user-supplied data. A remote unauthenticated attacker can craft a malicious URL containing JavaScript or HTML code, which is executed in the victim's browser …
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Medium 5.1
Stored Cross-Site Scripting in OrderAdministration Portal (AuftragsManager) via Business Reference in VertiGIS WebOrderSystem
The "ASMobile" web interface, which is part of the VertiGIS software package "GIS Portal", allows authenticated users to define a business reference. JavaScript code can be inserted into this field. On its own this only affects the user who entered it (self-X…
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Medium 5.1
Reflected Cross-Site Scripting in CustomerAdministration Portal (KundenManager)in VertiGIS WebOrderSystem
The CustomerAdministration portal (KundenManager) of VertiGIS WebOrderSystem allows privileged users to search for employees across all defined companies (user groups). The search term can be passed in the "searchValue" URL parameter, so the search is perform…
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Medium 4.8
Stored Cross-Site Scripting in CustomerAdministration Portal (KundenManager) in VertiGIS WebOrderSystem
The CustomerAdministration portal (KundenManager) of VertiGIS WebOrderSystem allows privileged users to manage the employees of defined companies (user groups). User properties, for example the "secondName" parameter, can be filled with JavaScript code while …