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
21,917 results · Clear filters · Feed
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Medium 6.1
Reflected XSS in Akıllı Ticaret's E-Commerce Pack
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Akıllı Ticaret Software Technologies Ltd. Co. E-Commerce Pack allows Reflected XSS. This issue affects E-Commerce Pack: through 2026-10-06. NOTE: The vendor …
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Medium 6.5
WordPress Front End PM plugin <= 11.4.6 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in Front End PM <= 11.4.6 versions.
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Medium 6.5
WordPress WC Fields Factory plugin <= 4.1.12 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in WC Fields Factory <= 4.1.12 versions.
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Medium 6.5
WordPress Ohio Extra plugin <= 3.6.8 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in Ohio Extra <= 3.6.8 versions.
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Medium 4.3
SourceCodester Simple Student Information System Profile Field register.php cross site scripting
A vulnerability was identified in SourceCodester Simple Student Information System 1.0. This issue affects some unknown processing of the file /register.php of the component Profile Field Handler. The manipulation of the argument firstname/lastname leads to c…
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Medium 6.5
WordPress JetElements For Elementor plugin <= 2.9.2.2 - 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 2.9.2.2.
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Medium 4.3
imgproxy SVG svg.go sanitizeElement cross site scripting
A flaw has been found in imgproxy up to 4.0.17. Affected by this vulnerability is the function sanitizeElement of the file processing/svg/svg.go of the component SVG Handler. Executing a manipulation can lead to cross site scripting. It is possible to launch …
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Medium 4.3
SourceCodester Drug Recommendation System add_drug.php cross site scripting
A security flaw has been discovered in SourceCodester Drug Recommendation System 1.0. This impacts an unknown function of the file Admin/add_drug.php. Performing a manipulation results in cross site scripting. The attack is possible to be carried out remotely…
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Medium 4.6
Joplin whiteboard card rendering allows CSS injection into application chrome
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.13, selecting a note containing a jsoncanvas fence causes the whiteboard text and file-node components in packages/app-desktop/gui/NoteEdito…
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Medium 5.4
Penpot: Stored XSS via Unsanitised SVG Uploads
Penpot is an open-source design and prototyping platform. Prior to 2.18.0, authenticated users with file-edit permission can upload SVG media whose scripts, event-handler attributes, and foreignObject elements are stored without sanitization and served as ima…
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Medium 6.8
Ghost: Stored XSS via SVG Files in Content Imports
Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, SVG images included in content imports were stored without sanitization. An attacker who convinced an Administrator to import a crafted file could host scripts on the site's domain, possib…
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Medium 6.5
WordPress RepairBuddy plugin <= 4.1225 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Webful Creations RepairBuddy computer-repair-shop allows Stored XSS.This issue affects RepairBuddy: from n/a through 4.1225.
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Medium 6.5
WordPress Image Slider Widget plugin <= 1.1.130 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in GhozyLab Image Slider Widget image-slider-widget allows Stored XSS.This issue affects Image Slider Widget: from n/a through 1.1.130.
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Medium 4.2
Quay: quay: dom-based cross-site scripting via unvalidated redirect_url on signin page
A flaw was found in Quay. A remote attacker could trick a user into logging in through a crafted link, resulting in cross-site scripting (XSS). Because the application does not validate the redirect destination before navigating, this flaw allows the executio…
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Medium 5.4
Quay: quay: dom-based cross-site scripting via oauth local callback format=json parameter
A flaw was found in Quay. A cross-site scripting (XSS) vulnerability in the OAuth callback handler allows a remote attacker to execute arbitrary JavaScript code within a user's browser session. By tricking a logged-in user into visiting a specially crafted li…
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Medium 5.3
Joomla Extension - joomshaper.com - Reflected XSS in the Dynamic Content Filter addon in SP Page Builder Pro 3.0.0 - 5.6.1p2
Joomla Extension - joomshaper.com - Reflected XSS in the Dynamic Content Filter addon in SP Page Builder Pro 3.0.0 - 5.6.1p2 - The slider minimum and maximum values are taken from the dc_filter_<fieldId> request parameter, split on the delimiter "l-r", HTML-e…
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Medium 5.4
LearnPress WordPress Plugin through 4.4.9.1 Stored XSS via Quiz Question Hint and Explanation
LearnPress plugin for WordPress through 4.4.9.1 contains a stored cross-site scripting vulnerability that allows authenticated instructors to inject scripts via quiz question hint and explanation fields. Attackers with the Instructor role can submit unsanitiz…
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Medium 4.3
feelec-yishu feelcrm-os Department Search Endpoint GroupController.class.php index cross site scripting
A vulnerability was identified in feelec-yishu feelcrm-os 1.0.0. This vulnerability affects the function GroupController::index of the file App/Feelcrm/Index/Controller/GroupController.class.php of the component Department Search Endpoint. The manipulation of…
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Medium 5.6
Stored XSS vulnerability in OAuth configuration form
The email media type OAuth form passes the Authorization endpoint value to window.open() without validating the URL scheme, so a javascript: URL is executed in the browser. This means a crafted media type configuration, deliverable as an import file, runs arb…
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Medium 4.3
feelec-yishu feelcrm-os Crm Endpoint functions.php index cross site scripting
A vulnerability has been found in feelec-yishu feelcrm-os 1.0.0. Affected by this vulnerability is the function IndexController::index of the file App/ThinkPHP/Common/functions.php of the component Crm Endpoint. Such manipulation of the argument redirect_url …
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Medium 6.5
WordPress Starter Templates plugin <= 4.7.7 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Brainstorm Force Starter Templates astra-sites allows Stored XSS.This issue affects Starter Templates: from n/a through 4.7.7.
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Medium 6.5
WordPress Name Directory plugin <= 1.34.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jeroen Peters Name Directory name-directory allows Stored XSS.This issue affects Name Directory: from n/a through 1.34.2.
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Medium 6.5
WordPress Presto Player plugin <= 4.5.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Brainstorm Force Presto Player presto-player allows Stored XSS.This issue affects Presto Player: from n/a through 4.5.2.
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Medium 6.5
WordPress Premium Addons for Elementor plugin <= 4.11.109 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LeapWorx Premium Addons for Elementor premium-addons-for-elementor allows Stored XSS.This issue affects Premium Addons for Elementor: from n/a through 4.11.1…
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Medium 6.5
WordPress Logo Showcase plugin <= 4.0.4 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Themepoints Logo Showcase logo-showcase allows Stored XSS.This issue affects Logo Showcase: from n/a through 4.0.4.
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Medium 6.5
WordPress MP3 Audio Player for Music, Radio & Podcast by Sonaar plugin <= 5.14.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Sonaar MP3 Audio Player for Music, Radio & Podcast by Sonaar mp3-music-player-by-sonaar allows Stored XSS.This issue affects MP3 Audio Player for Music, Radi…
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Medium 6.5
WordPress eCommerce Product Catalog plugin <= 3.6.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in impleCode eCommerce Product Catalog ecommerce-product-catalog allows Stored XSS.This issue affects eCommerce Product Catalog: from n/a through 3.6.2.
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Medium 6.5
WordPress QR Redirector plugin <= 2.0.5 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nikki Blight QR Redirector qr-redirector allows Stored XSS.This issue affects QR Redirector: from n/a through 2.0.5.
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Medium 6.5
WordPress GiveWP plugin <= 4.17.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP GiveWP give allows Stored XSS.This issue affects GiveWP: from n/a through 4.17.0.
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Medium 6.5
WordPress B Blocks plugin <= 2.1.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins B Blocks b-blocks allows Stored XSS.This issue affects B Blocks: from n/a through 2.1.8.
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Medium 6.5
WordPress Image Photo Gallery Final Tiles Grid plugin <= 3.6.13 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill Image Photo Gallery Final Tiles Grid final-tiles-grid-gallery-lite allows Stored XSS.This issue affects Image Photo Gallery Final Tiles Grid: from n…
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Medium 6.1
Bacularis 5.4.0 - 6.5.1 is vulnerable to Cross Site Scripting (XSS) in the Organization name field.
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Medium 5.4
In Bacularis v1.0.0 - 6.5.1 when adding a new pool, the LabelFormat field allows for a Cross Site Scripting (XSS) paylo…
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Medium 5.4
YesWiki before 4.6.7 Stored XSS via Bazar valeur Action
YesWiki before 4.6.7 contains a cross-site scripting vulnerability in the Bazar valeur action that allows page editors to inject script by rendering unescaped HTML fetched from a remote URL. Attackers can point tools/bazar/actions/valeur.php at a controlled s…
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Medium 6.8
Horizontal Scrolling Announcements <= 2.6 - Contributor+ Stored XSS via Style Field
The Horizontal scrolling announcements WordPress plugin through 2.6 does not sanitise and escape one of its announcement settings before outputting it into an attribute context on the front end, allowing users granted access to the announcement management pag…
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Medium 6.1
W (wcms) through 3.18.0 Unauthenticated Stored XSS via Login Username and Comments
W (vincent-peugnet/wcms) through 3.18.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the login user field and visitor comment website field. Attackers can submit failed logins rendered unesca…
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Medium 6.1
OpenAM before 16.1.3 Latent XSS in SAML Load-Balancer Cookie Bounce Page
OpenAM before 16.1.3 contains a latent cross-site scripting defect that places the SAML message, relay state and target URL unencoded into the load-balancer cookie bounce auto-submit page. If reachable with cookieHashRedirectEnabled set, crafted requests coul…
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Medium 6.1
OpenAM before 16.1.3 Reflected XSS via OAuth2 Authorization Error Page
OpenAM before 16.1.3 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying crafted parameters rendered unencoded on the OAuth2 authorization error page. Attackers can lure victims to a craf…
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Medium 6.4
Twenty20 Image Before-After <= 2.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'offset' Shortcode Attribute
The Twenty20 Image Before-After plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'offset' Shortcode Attribute in all versions up to, and including, 2.0.5 due to insufficient input sanitization and output escaping. This makes it possible f…
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Medium 6.1
WPC Estimated Delivery Date for WooCommerce <= 4.0.1 - Reflected Cross-Site Scripting via 'rule_data' Parameter
The WPC Estimated Delivery Date for WooCommerce plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'rule_data' parameter in all versions up to, and including, 4.0.1 due to insufficient input sanitization and output escaping. This mak…