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 7.1
WordPress Theme Switcher Reloaded Plugin <= 1.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in undoIT Theme Switcher Reloaded theme-switcher-reloaded allows Reflected XSS.This issue affects Theme Switcher Reloaded: from n/a through <= 1.1.
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High 7.1
WordPress NextGEN Gallery Search Plugin <= 2.12 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Koen Schuit NextGEN Gallery Search nextgen-gallery-search-galleries allows Reflected XSS.This issue affects NextGEN Gallery Search: from n/a through <= 2.12.
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High 7.1
WordPress XmasB Quotes Plugin <= 1.6.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in XmasB XmasB Quotes xmasb-quotes allows Reflected XSS.This issue affects XmasB Quotes: from n/a through <= 1.6.1.
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High 7.1
WordPress Yahoo! WebPlayer Plugin <= 2.0.6 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in 8bitkid Yahoo! WebPlayer yahoo-media-player allows Reflected XSS.This issue affects Yahoo! WebPlayer: from n/a through <= 2.0.6.
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High 8.8
WordPress Houzez Theme <= 4.1.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in favethemes Houzez allows Reflected XSS. This issue affects Houzez: from n/a through 4.1.1.
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High 8.8
Stored XSS permitting session takeover of arbitrary user
Stored XSS vulnerability exists in the "Oddział" (Ward) module, in the death diagnosis description field, and allows the execution of arbitrary JavaScript code. This can lead to session hijacking of other users and potentially to privilege escalation up to fu…
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High 7.3
In Hyundai Navigation App STD5W.EUR.HMC.230516.afa908d, an attacker can inject HTML payloads in the profile name field …
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High 8.8
In FoxCMS 1.2.6, there is a reflected Cross Site Scripting (XSS) vulnerability in /index.php/plus.
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High 8.5
OpenText Enterprise Security Manager Stored XSS
A Stored Cross-Site Scripting (XSS) vulnerability has been identified in OpenText Enterprise Security Manager. The vulnerability could be remotely exploited.
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High 8.5
Extension - norrnext.com - Stored XSS vulnerability in Quantum Manager component 1.0.0-3.2.0 for Joomla
A stored XSS vulnerability in Quantum Manager component 1.0.0-3.2.0 for Joomla was discovered. The SVG upload feature does not sanitize uploads.
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High 8.5
Extension - norrnext.com - Stored XSS vulnerability in Quantum Manager component 1.0.0-3.2.0 for Joomla
A stored XSS vulnerability in Quantum Manager component 1.0.0-3.2.0 for Joomla was discovered. File names are not properly escaped.
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High 8.8
FoxCMS 1.2.6, there is a Cross Site Scripting vulnerability in /index.php/article. This allows attackers to execute arb…
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High 8.1CVE-2025-5352 Public exploit
Environment Variable XSS in Analytics Component in lunary-ai/lunary
A critical stored Cross-Site Scripting (XSS) vulnerability exists in the Analytics component of lunary-ai/lunary versions up to 1.9.23, where the NEXT_PUBLIC_CUSTOM_SCRIPT environment variable is directly injected into the DOM using dangerouslySetInnerHTML wi…
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High 7.1
WP Talroo <= 2.4 - Reflected XSS
The WP Talroo WordPress plugin through 2.4 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin and unauthenticated users.
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High 8.8
QuantumNous new-api v.0.8.5.2 is vulnerable to Cross Site Scripting (XSS).
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High 8.0
UnoPim Stored XSS via SVG MIME/Sanitizer Bypass
UnoPim is an open-source Product Information Management (PIM) system built on the Laravel framework. Before 0.2.1, UnoPim contains a stored cross-site scripting vulnerability via SVG MIME/sanitizer bypass in the /admin/settings/users/create endpoint. This vul…
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High 8.8
A Reflected Cross Site Scripting (XSS) vulnerability was found in /index.php in FoxCMS v1.2.6. When a crafted script is…
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High 8.7
In JetBrains YouTrack before 2025.2.92387 stored XSS was possible via Mermaid diagram content
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High 7.1
WordPress WP Pipes Plugin <= 1.4.3 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThimPress WP Pipes allows Reflected XSS. This issue affects WP Pipes: from n/a through 1.4.3.
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High 7.1
WordPress iFrame Block plugin <= 0.1.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Vikas Sharma iFrame Block allows Stored XSS. This issue affects iFrame Block: from n/a through 0.1.1.
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High 7.1
WordPress Super Store Finder Plugin <= 7.6 - Reflected Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in highwarden Super Store Finder superstorefinder-wp allows Reflected XSS.This issue affects Super Store Finder: from n/a through <= 7.6.
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High 7.1
WordPress Ultra Portfolio - WordPress Plugin <= 6.7 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themepassion Ultra Portfolio ultra-portfolio allows Reflected XSS.This issue affects Ultra Portfolio: from n/a through <= 6.7.
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High 7.1
WordPress Support Ticket Plugin <= 1.9 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themepassion Support Ticket support-ticket allows Reflected XSS.This issue affects Support Ticket: from n/a through <= 1.9.
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High 7.5
WordPress Cookie Warning plugin <= 1.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Dourou Cookie Warning allows Stored XSS. This issue affects Cookie Warning: from n/a through 1.3.
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High 7.1
WordPress Nuss Theme <= 1.3.3 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in uxper Nuss nuss allows Reflected XSS.This issue affects Nuss: from n/a through <= 1.3.3.
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High 7.1
WordPress CM Map Locations <= 2.1.6 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CreativeMindsSolutions CM Map Locations cm-map-locations allows Reflected XSS.This issue affects CM Map Locations: from n/a through <= 2.1.6.
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High 7.1
WordPress Multimedia Playlist Slider Addon for WPBakery Page Builder Plugin <= 2.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Multimedia Playlist Slider Addon for WPBakery Page Builder lbg_vp_youtube_vimeo_addon_visual_composer allows Reflected XSS.This issue affects Mu…
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High 7.1
WordPress Rentsyst Plugin <= 2.0.100 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in dimafreund Rentsyst rentsyst allows Reflected XSS.This issue affects Rentsyst: from n/a through <= 2.0.100.
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High 7.1
WordPress Youtube Vimeo Video Player and Slider WP Plugin <= 3.8 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Youtube Vimeo Video Player and Slider WP Plugin video-player-youtube-vimeo allows Reflected XSS.This issue affects Youtube Vimeo Video Player an…
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High 7.1
WordPress Simple Business Directory Pro <= 15.5.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in quantumcloud Simple Business Directory Pro simple-business-directory-pro allows Reflected XSS.This issue affects Simple Business Directory Pro: from n/a thro…
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High 7.1
WordPress SHOUT - HTML5 Radio Player With Ads - ShoutCast and IceCast Support <= 3.5.4 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup SHOUT - HTML5 Radio Player With Ads - ShoutCast and IceCast Support lbg-audio8-html5-radio-ads allows Reflected XSS.This issue affects SHOUT - H…
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High 7.1
WordPress Apollo - Sticky Full Width HTML5 Audio Player <= 3.4 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Apollo - Sticky Full Width HTML5 Audio Player lbg-audio5-html5-shoutcast-sticky allows Reflected XSS.This issue affects Apollo - Sticky Full Wid…
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High 7.1
WordPress Universal Video Player - Addon for WPBakery Page Builder <= 3.2.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Universal Video Player - Addon for WPBakery Page Builder lbg-universal-video-player-addon-visual-composer allows Reflected XSS.This issue affect…
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High 7.1
WordPress UpStore <= 1.7.0 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in skygroup UpStore upstore allows Reflected XSS.This issue affects UpStore: from n/a through <= 1.7.0.
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High 7.1
WordPress Simple Link Directory < 14.8.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in quantumcloud Simple Link Directory qc-simple-link-directory allows Reflected XSS.This issue affects Simple Link Directory: from n/a through < 14.8.1.
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High 7.1
WordPress Jobmonster theme <= 4.7.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NooTheme Jobmonster noo-jobmonster allows Reflected XSS.This issue affects Jobmonster: from n/a through <= 4.7.8.
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High 7.1
WordPress Radio Player Shoutcast & Icecast <= 4.4.7 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Radio Player Shoutcast & Icecast lbg-audio4-html5-shoutcast allows Reflected XSS.This issue affects Radio Player Shoutcast & Icecast: from n/a t…
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High 7.1
WordPress Revolution Video Player With Bottom Playlist <= 2.9.2 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Revolution Video Player With Bottom Playlist revolution-video-player allows Reflected XSS.This issue affects Revolution Video Player With Bottom…
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High 7.1
WordPress Comments Capcha Box Plugin <= 1.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in digitalzoomstudio Comments Capcha Box comments-capcha-box allows Reflected XSS.This issue affects Comments Capcha Box: from n/a through <= 1.1.
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High 7.1
WordPress Raptive Ads Plugin <= 3.8.0 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Raptive Raptive Ads adthrive-ads allows Reflected XSS.This issue affects Raptive Ads: from n/a through <= 3.8.0.