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
6,268 results · Clear filters · Feed
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High 8.4
Admin reflected XSS
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Lemonsoft WordPress add on allows Cross-Site Scripting (XSS).This issue affects WordPress add on: 2025.7.1.
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High 8.0CVE-2026-22804 Public exploit
Termix has a Stored XSS in File Manager leading to Local File Inclusion (LFI) in Electron and Session Hijacking in Browser
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 1.7.0 to 1.9.0, Stored Cross-Site Scripting (XSS) vulnerability exists in the Termix File Manager component. The application fails to sanitize S…
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High 8.6
Label Studio vulnerable to full account takeover by chaining Stored XSS + IDOR in User Profile via custom_hotkeys field
Label Studio is a multi-type data labeling and annotation tool. In 1.22.0 and earlier, a persistent stored cross-site scripting (XSS) vulnerability exists in the custom_hotkeys functionality of the application. An authenticated attacker (or one who can trick …
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High 8.1CVE-2026-22704 Public exploit
HAXcms Has Stored XSS Vulnerability that May Lead to Account Takeover
HAX CMS helps manage microsite universe with PHP or NodeJs backends. In versions 11.0.6 to before 25.0.0, HAX CMS is vulnerable to stored XSS, which could lead to account takeover. This issue has been patched in version 25.0.0.
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High 8.5CVE-2026-22610 Public exploit
Angular has XSS Vulnerability via Unsanitized SVG Script Attributes
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.18, 20.3.16, 21.0.7, and 21.1.0-rc.0, a cross-site scripting (XSS) vulnerability has been identified in …
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High 8.0
React Router vulnerable to XSS via Open Redirects
React Router is a router for React. In @remix-run/router version prior to 1.23.2 and react-router 7.0.0 through 7.11.0, React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unsta…
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High 8.2
React Router SSR XSS in ScrollRestoration
React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Ser…
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High 7.6CVE-2025-59057 Public exploit
React Router has XSS Vulnerability
React Router is a router for React. In @remix-run/react versions 1.15.0 through 2.17.0. and react-router versions 7.0.0 through 7.8.2, a XSS vulnerability exists in in React Router's meta()/<Meta> APIs in Framework Mode when generating script:ld+json tags whi…
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High 8.7
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.2 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an authenticated user to achieve stored cross-site scripting by exploiting GitLab Flavored Mark…
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High 8.0
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an unauthenticated user to execute arbitrary code in the context of an authenticated user's browser by convincing the…
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High 7.2
Frontend Admin by DynamiApps <= 3.28.23 - Unauthenticated Stored Cross-Site Scripting via 'update_field'
The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'acff' parameter in the 'frontend_admin/forms/update_field' AJAX action in all versions up to, and including, 3.28.23 due to insufficient input sanitiza…
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High 7.2
SlimStat Analytics <= 5.3.4 - Unauthenticated Stored Cross-Site Scripting via 'notes/resource' Parameters
The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'notes' and 'resource' parameters in all versions up to, and including, 5.3.4 due to insufficient input sanitization and output escaping. This makes it possible f…
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High 7.2
SlimStat Analytics <= 5.3.3 - Unauthenticated Stored Cross-Site Scripting via 'fh' Parameter
The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `fh` (fingerprint) parameter in all versions up to, and including, 5.3.3. This is due to insufficient input sanitization and output escaping on the fingerprint va…
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High 7.2
Brevo for WooCommerce <= 4.0.49 - Unauthenticated Stored Cross-Site Scripting
The Brevo for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘user_connection_id’ parameter in all versions up to, and including, 4.0.49 due to insufficient input sanitization and output escaping. This makes it possible …
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High 8.8
Salvo is vulnerable to stored XSS in the list_html function by uploading files with malicious names
Salvo is a Rust web backend framework. Prior to version 0.88.1, the function list_html generates a file view of a folder without sanitizing the files or folders names, this may potentially lead to XSS in cases where a website allow the access to public files …
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High 8.8
Salvo is vulnerable to reflected XSS in the list_html function
Salvo is a Rust web backend framework. Prior to version 0.88.1, the function list_html generate an file view of a folder which include a render of the current path, in which its inserted in the HTML without proper sanitation, this leads to reflected XSS using…
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High 7.2
Zero-click XSS in all NiceGUI apps which uses `ui.sub_pages`
NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the pushstate event listener used by ui.sub_pages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-sit…
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High 7.1
WordPress WP App Bar plugin <= 1.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Ryan Sutana WP App Bar wp-app-bar allows Reflected XSS.This issue affects WP App Bar: from n/a through <= 1.5.
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High 7.1
WordPress Scroll rss excerpt plugin <= 5.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in gopiplus@hotmail.com Scroll rss excerpt scroll-rss-excerpt allows Reflected XSS.This issue affects Scroll rss excerpt: from n/a through <= 5.0.
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High 7.1
WordPress e-shops plugin <= 1.0.4 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in hands01 e-shops e-shops-cart2 allows DOM-Based XSS.This issue affects e-shops: from n/a through <= 1.0.4.
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High 7.1
WordPress WP-BusinessDirectory plugin <= 4.0.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CMSJunkie - WordPress Business Directory Plugins WP-BusinessDirectory wp-businessdirectory allows Reflected XSS.This issue affects WP-BusinessDirectory: from…
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High 7.1
WordPress Pinpoll plugin <= 4.0.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Pinpoll Pinpoll pinpoll allows Reflected XSS.This issue affects Pinpoll: from n/a through <= 4.0.0.
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High 7.1
WordPress Visitor Stats Widget plugin <= 1.5.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Shahjada Visitor Stats Widget visitor-stats-widget allows Reflected XSS.This issue affects Visitor Stats Widget: from n/a through <= 1.5.0.
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High 7.1
WordPress PRIMER by chloédigital plugin <= 1.0.25 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in chloédigital PRIMER by chloédigital primer-by-chloedigital allows Reflected XSS.This issue affects PRIMER by chloédigital: from n/a through <= 1.0.25.
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High 7.1
WordPress Taskbuilder plugin <= 4.0.9 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in taskbuilder Taskbuilder taskbuilder allows Reflected XSS.This issue affects Taskbuilder: from n/a through <= 4.0.9.
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High 7.1
WordPress Listeo Core plugin < 2.0.19 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in purethemes Listeo Core listeo-core allows Reflected XSS.This issue affects Listeo Core: from n/a through < 2.0.19.
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High 7.1
WordPress eHive Search plugin <= 2.5.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Vernon Systems Limited eHive Search ehive-search allows Reflected XSS.This issue affects eHive Search: from n/a through <= 2.5.0.
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High 7.1
WordPress Link Whisper Free plugin <= 0.8.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Spencer Haws Link Whisper Free link-whisper allows Reflected XSS.This issue affects Link Whisper Free: from n/a through <= 0.8.8.
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High 7.1
WordPress Grand Restaurant theme < 7.0.9 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeGoods Grand Restaurant grandrestaurant allows Reflected XSS.This issue affects Grand Restaurant: from n/a through < 7.0.9.
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High 7.1
WordPress Woffice theme <= 5.4.30 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WofficeIO Woffice woffice allows Reflected XSS.This issue affects Woffice: from n/a through <= 5.4.30.
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High 7.1
WordPress Jobify theme <= 4.3.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Astoundify Jobify jobify allows Reflected XSS.This issue affects Jobify: from n/a through <= 4.3.0.
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High 7.1
WordPress Famous - Responsive Image And Video Grid Gallery WordPress Plugin plugin <= 1.4 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Famous - Responsive Image And Video Grid Gallery WordPress Plugin famous_grid_image_and_video_gallery allows Reflected XSS.This issue affects Fa…
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High 7.1
WordPress CountDown With Image or Video Background plugin <= 1.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup CountDown With Image or Video Background countdown-with-background allows Reflected XSS.This issue affects CountDown With Image or Video Backgro…
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High 7.1
WordPress WP Virtual Assistant plugin <= 3.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in loopus WP Virtual Assistant VirtualAssistant allows Stored XSS.This issue affects WP Virtual Assistant: from n/a through <= 3.1.
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High 7.1
WordPress Real Estate Pro plugin <= 2.1.4 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e-plugins Real Estate Pro real-estate-pro allows Reflected XSS.This issue affects Real Estate Pro: from n/a through <= 2.1.4.
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High 7.1
WordPress ListingHub plugin 1.2.6 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e-plugins ListingHub listinghub allows Reflected XSS.This issue affects ListingHub: from n/a through 1.2.6.
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High 8.7
Cross-Site Scripting in phpgurukul Hostel Management System v2.1 user-provided complaint fields (Explain the Complaint)…
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High 7.1
WordPress WidgetKit Pro plugin <= 1.13.1 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Themesgrove WidgetKit Pro allows Reflected XSS.This issue affects WidgetKit Pro: from n/a through 1.13.1.
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High 7.1
WordPress DZS Video Gallery plugin <= 12.25 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Digital zoom studio DZS Video Gallery allows Reflected XSS.This issue affects DZS Video Gallery: from n/a through 12.25.
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High 7.1
WordPress Arlo theme <= 6.0.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Frenify Arlo arlo allows Reflected XSS.This issue affects Arlo: from n/a through <= 6.0.3.