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)
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
-
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
32,761 results · Feed
-
Medium 5.1
Stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality.
A stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality. Insufficient sanitization and encoding of the specified fields allow JavaScript to be stored, which executes in other users’ browsers when they view th…
-
Medium 5.1
Stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality.
A stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality. Insufficient sanitization and encoding of the specified fields allow JavaScript to be stored, which executes in other users’ browsers when they view th…
-
Medium 5.1
Stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality.
A stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality. Insufficient sanitization and encoding of the specified fields allow JavaScript to be stored, which executes in other users’ browsers when they view th…
-
Medium 5.1
Stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality.
A stored Cross-Site Scripting (XSS) vulnerability in Alosuite that affects the delivery note functionality. Insufficient sanitization and encoding of the specified fields allow JavaScript to be stored, which executes in other users’ browsers when they view th…
-
Medium 5.1
Cross-Site Scripting in extension "Mail" (mail)
The HTML content of mails and tracked URLs are rendered unescaped in the backend module. Backend users with access to the mail module can inject arbitrary HTML and JavaScript, which is executed in the context of other backend users viewing the mail preview or…
-
Medium 6.1
billboard.js before 4.1.3 allows an attacker to execute malicious JavaScript due to improper sanitization of series ids…
-
Medium 6.1
Reflected Cross-Site Scripting via Authentication Endpoint in Multiple WSO2 Products Allows Browser Redirection and UI Modification
The authentication endpoint does not properly encode user-supplied input before rendering it within the web page. This lack of output encoding allows an attacker to inject malicious JavaScript payloads into the authentication flow, which are then executed by …
-
Medium 6.4
Photo Engine (Media Organizer & Lightroom) <= 6.5.7 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Collection Name
The Photo Engine (Media Organizer & Lightroom) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'hierarchy[].name' parameter in all versions up to, and including, 6.5.7 due to insufficient input sanitization and output escaping. This …
-
Medium 6.4
News Kit Addons For Elementor <= 1.4.8 - Authenticated (Subscriber+) Stored Cross-Site Scripting via nekit_update_mega_menu_form AJAX Action
The News Kit Addons For Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'formData' parameter in all versions up to, and including, 1.4.8 due to insufficient input sanitization and output escaping. This makes it possible for…
-
Medium 6.4
SEO Engine <= 0.9.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Entity-Encoded Post Title via Strip-then-Decode in build_title()
The SEO Engine – Smart SEO with AI, Schema & Redirection for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' parameter in all versions up to, and including, 0.9.9 due to insufficient input sanitization and output es…
-
Medium 4.3CVE-2026-120597 Scanner template
Welcart e-Commerce Plugin paymentESCOTT.main.class.php error_page_message cross site scripting
A vulnerability was identified in Welcart e-Commerce Plugin up to 2.12.6 on WordPress. This affects the function ESCOTT_MAIN::error_page_message of the file classes/paymentESCOTT.main.class.php. Such manipulation of the argument ResponseCd leads to cross site…
-
Medium 5.0
Stored cross-site scripting in the HTML report generator of aidlc-traceability in AWS AI-DLC Workflows
Stored cross-site scripting (XSS) in the HTML report generator in the aidlc-traceability CLI in AWS AI-DLC Workflows before 2026-07-03 might allow an actor who can modify a project's AI-DLC artifact files to execute arbitrary script in the browser of a user w…
-
Medium 5.4
Munshi XSS via Purchase Inquiry Thread Rendering
Munshi (by Petpooja) before 2026-07-13 contained a stored cross-site scripting vulnerability that allows authenticated users to inject malicious markup through item descriptions or messages submitted in the Purchase Inquiry thread (/purchase-inquiry/thread/{t…
-
High 8.4
FOSSBilling: Low-privileged staff can run JavaScript in administrators' browsers via stored XSS in support ticket notes
FOSSBilling is an open source billing and client-management platform. From 0.1.0 until 0.8.9, the admin/support/note_create endpoint stores the note parameter without sanitization in the support_ticket_note table, and src/modules/Support/templates/admin/mod_s…
-
Medium 6.1
An Otter Wiki before 2.26.2 Stored XSS via Math Code Block
An Otter Wiki before 2.26.2 contains a stored cross-site scripting vulnerability in OtterwikiMdRenderer.block_code that allows attackers who can edit pages, including anonymous users under the default configuration, to inject arbitrary script. Attackers can p…
-
Medium 6.1
XSS in wrensec-commons CREST framework HTTP binding via _mimeType parameter
wrensec-commons contains a reflected cross-site scripting (XSS) vulnerability in the CREST framework's HTTP binding. The HttpUtils.prepareResponse() method used the _mimeType request parameter to set the Content-Type response header without proper sanitizatio…
-
Medium 5.4CVE-2026-120491 Public exploit
Wing FTP Server before 8.2.6 Stored XSS via nowpath in Legacy Activity Page
Wing FTP Server before 8.2.6 contains a stored cross-site scripting vulnerability that allows authenticated web-client users to inject script by sending a crafted nowpath parameter to webclient/makethumb.html. Attackers can break out of the directory CDATA se…
-
Medium 5.4
LaraDashboard before 1.4.9 Stored XSS via LaraBuilder design_json Block Content
LaraDashboard before 1.4.9 contains a stored cross-site scripting vulnerability that allows authenticated users with post.create or post.edit permission to inject scripts via unsanitized LaraBuilder design_json block content. Attackers can save text-editor, H…
-
Medium 6.1
GoFound through 1.4.1 Stored XSS via Admin Dashboard Search Results
GoFound through 1.4.1 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts by submitting document text to /api/index. Attackers can index malicious HTML that searcher/engine.go returns unescaped and dash…
-
Medium 6.1
PandaWiki 3.65.0 through 3.87.5 Stored XSS via /static-file/ PDF Query-String Bypass
PandaWiki 3.65.0 through 3.87.5 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to upload HTML files with image extensions via /share/v1/common/file/upload. Attackers can lure administrators to /static-file/<key>?a=.…
-
High 8.6
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Media Picker in Helix Ultimate < 2.2.11.
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Media Picker in Helix Ultimate < 2.2.11.
-
Medium 5.3
Joomla Extension - php-web-design.com - Reflected XSS in StageIt 1.0-5.7.5, 6.0-6.3.5
Joomla Extension - php-web-design.com - Reflected XSS in StageIt 1.0-5.7.5, 6.0-6.3.5
-
High 8.6
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Mega Menu Badge Text in Helix Ultimate < 2.2.11.
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Mega Menu Badge Text in Helix Ultimate < 2.2.11.
-
Medium 6.8
Dell OpenManage Enterprise, versions prior to 4.8.0, contains an Improper Neutralization of Input During Web Page Gener…
-
Medium 4.8
Stored Cross-Site Scripting in Multiple WSO2 Products
The Publisher portal fails to enforce proper validation on uploaded SVG files, allowing users with the Publisher role to inject malicious scripts. This weakness can be exploited by uploading a crafted SVG file, which is then stored and rendered by the applica…
-
Medium 4.6
Reflected Cross-Site Scripting via User Search Function in Management Console of Multiple WSO2 Products
The user search function within the management console fails to properly encode user-supplied input before rendering it in the browser. This allows an attacker to inject malicious scripts that are then executed by the user's browser in the context of the mana…
-
Medium 4.3
mathurvishal CloudClassroom-PHP-Project manageassessment2.php cross site scripting
A flaw has been found in mathurvishal CloudClassroom-PHP-Project. The impacted element is an unknown function of the file manageassessment2.php. This manipulation of the argument ExamName/Q1/Q2/Q3/Q4/Q5 causes cross site scripting. The attack is possible to b…
-
Medium 4.3
mathurvishal CloudClassroom-PHP-Project updatedetailsfromfaculty.php cross site scripting
A security flaw has been discovered in mathurvishal CloudClassroom-PHP-Project. This vulnerability affects unknown code of the file updatedetailsfromfaculty.php. Performing a manipulation of the argument fname results in cross site scripting. The attack may b…
-
High 7.6
Apache Wicket: XSS via a resource bundle text written unescaped into generated JavaScript and markup
Apache Wicket reads texts from the application's resource bundles — a localized label, a css class name — and writes some of them into the JavaScript and the markup it generates for a component. Those texts are placed inside single-quoted JavaScript string li…
-
High 7.6
Apache Wicket: XSS via a component id or markup id written unescaped into generated JavaScript and markup
Improper neutralization of input during web page generation in Apache Wicket. Apache Wicket generates JavaScript that refers to the elements it renders, and writes into that JavaScript two values it derives itself: a component's markup id, and the input name …
-
High 7.4
Apache Wicket: XSS in ExternalLink via the model URL when the component is bound to a non-anchor tag
Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.html.link.ExternalLink builds a JavaScript click handler and writes it into the tag's onclick attribute whenever the markup tag the component is bound to is…
-
High 7.4
Apache Wicket: XSS in SmartLinkLabel and SmartLinkMultiLineLabel via a javascript: URL in the model data
Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.extensions.markup.html.basic.SmartLinkLabel and org.apache.wicket.extensions.markup.html.basic.SmartLinkMultiLineLabel display a text value and turn any URL they f…
-
High 7.6
Apache Wicket: XSS in AjaxNewWindowNotifyingBehavior via the client-supplied window name
Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.ajax.AjaxNewWindowNotifyingBehavior notices that a page instance has been opened in a second browser window or tab. It asks the browser for the value of window.nam…
-
Low 2.4
Ruijie RG-ES205GC Cloud Management set_cloud_serverUrl.cgi cross site scripting
A security flaw has been discovered in Ruijie RG-ES205GC, RG-ES206GC-P, RG-ES208GC, RG-ES210GC-LP and RG-ES210GS-P ESW_1.0(1)B1P48. The affected element is an unknown function of the file set_cloud_serverUrl.cgi of the component Cloud Management. The manipula…
-
High 7.1
WordPress WordPress File Upload plugin <= 5.2.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nickboss WordPress File Upload wp-file-upload allows Stored XSS.This issue affects WordPress File Upload: from n/a through 5.2.1.
-
Medium 5.4
Gitea stored XSS through legacy Actions artifact Content-Encoding
Legacy (v1 to v3) Actions artifact uploads stored the request's `Content-Encoding` header unchecked in the column that is served as the artifact's `Content-Type` on download, and a value starting with `video/` or `audio/` also removed the sandboxing Content-S…
-
Low 3.5CVE-2026-120218 Public exploit
Typemill SvgSanitizer.php saveImage cross site scripting
A flaw has been found in Typemill up to 2.26.0. The impacted element is the function ControllerApiImage::saveImage of the file system/typemill/Models/SvgSanitizer.php. Executing a manipulation can lead to cross site scripting. The attack may be performed from…
-
Medium 6.8
Media Library Assistant < 3.44 - Contributor+ Stored XSS via mla_item_parameter Shortcode Attribute
The Media Library Assistant WordPress plugin before 3.44 does not escape one of its shortcode attributes before outputting it in an attribute of generated links, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks.
-
Medium 4.8
Thelia before 3.1.1 Stored XSS via SVG Store Logo and Banner Uploads
Thelia before 3.1.1 contains a stored cross-site scripting vulnerability that allows authenticated back-office administrators with store update permission to inject scripts by uploading unsanitized SVG logo_file or banner_file images. Attackers can upload an …
-
Low 3.5
PostyBirb Plus Submission Description Editor DescriptionInput.tsx cross site scripting
A security flaw has been discovered in PostyBirb Plus up to 3.1.75. Affected by this vulnerability is an unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description E…