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 WPCHURCH plugin <= 2.7.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Dasinfomedia WPCHURCH allows Reflected XSS.This issue affects WPCHURCH: from n/a through 2.7.0.
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High 8.4
Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed rendering of malicious HTML
An Improper Neutralization of Input During Web Page Generation vulnerability was identified in GitHub Enterprise Server that allowed attacker controlled HTML to be rendered by the Filter component (search) across GitHub that could be used to exfiltrate sensit…
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High 7.1
Reflected Cross Site Scripting (XSS) vulnerability in AA-Team WordPress plugins
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in AA-Team Woocommerce Sales Funnel Builder, AA-Team Amazon Affiliates Addon for WPBakery Page Builder (formerly Visual Composer) allows Reflected XSS.This issu…
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High 7.1
WordPress Header Image Slider plugin <= 0.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Shazdeh Header Image Slider header-image-slider allows DOM-Based XSS.This issue affects Header Image Slider: from n/a through 0.3.
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High 7.1
WordPress Photo Gallery plugin <= 2.7.7.26 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in gt3themes Photo Gallery gt3-photo-video-gallery allows Reflected XSS.This issue affects Photo Gallery: from n/a through <= 2.7.7.26.
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High 7.1
WordPress JobBank plugin <= 1.2.2 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e-plugins JobBank jobbank allows Reflected XSS.This issue affects JobBank: from n/a through <= 1.2.2.
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High 7.2
`vega-functions` vulnerable to Cross-site Scripting via `setdata` function
vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unint…
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High 8.1
Vega Cross-Site Scripting (XSS) via expression abusing vlSelectionTuples function array map calls in environments with satisfactory function gadgets in the global scope
Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to versions 6.1.2 and 5.6.3, applications meeting two conditions are at risk of arbitrary JavaScript code execution, even if "safe…
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High 7.5
A Cross-Site Scripting (XSS) vulnerability in the UCRM Argentina AFIP invoices Plugin (v1.2.0 and earlier) could allow …
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High 7.1
WordPress iPhone Webclip Manager plugin <= 0.5 - CSRF to Stored XSS vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in corourke iPhone Webclip Manager iphone-webclip-manager allows Stored XSS.This issue affects iPhone Webclip Manager: from n/a through <= 0.5.
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High 7.1
WordPress Tumult Hype Animations plugin <= 1.9.11 - CSRF to XSS vulnerability
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Tumult Inc Tumult Hype Animations allows DOM-Based XSS.This issue affects Tumult Hype Animations: from n/a through 1.9.11.
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High 7.1
WordPress Machic Core plugin <= 1.2.6 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in KlbTheme Machic Core allows DOM-Based XSS.This issue affects Machic Core: from n/a through 1.2.6.
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High 7.7
Stored Cross-site Scripting (XSS) in Kentico Xperience 13
Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.
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High 7.2
Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style S…
KEV Mar 18, 2026 -
High 7.0
Emlog: CSRF chained with stored XSS leads to ATO
Emlog is an open source website building system. In version 2.5.23, article creation functionality is vulnerable to cross-site request forgery (CSRF). This can lead to a user being forced to post an article with arbitrary, attacker-controlled content. This, w…
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High 7.1
WordPress Easy Social plugin <= 1.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in osuthorpe Easy Social easy-social-media allows Reflected XSS.This issue affects Easy Social: from n/a through <= 1.3.
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High 7.1
WordPress Sala theme <= 1.1.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in uxper Sala allows Reflected XSS.This issue affects Sala: from n/a through 1.1.3.
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High 7.1
WordPress Blappsta Mobile App Plugin – Your native, mobile iPhone App and Android App Plugin <= 0.8.8.8 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in nebelhorn Blappsta Mobile App Plugin – Your native, mobile iPhone App and Android App yournewsapp allows Reflected XSS.This issue affects Blappsta Mobile App…
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High 7.1
WordPress ZoomSounds plugin <= 6.91 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ZoomSounds allows Reflected XSS.This issue affects ZoomSounds: from n/a through 6.91.
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High 7.1
WordPress ZD Scribd iPaper plugin <= 1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Proloy Chakroborty ZD Scribd iPaper zd-scribd-ipaper allows Reflected XSS.This issue affects ZD Scribd iPaper: from n/a through <= 1.0.
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High 7.1
WordPress ZhinaTwitterWidget plugin <= 1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in zckevin ZhinaTwitterWidget zhina-twitter-widget allows Reflected XSS.This issue affects ZhinaTwitterWidget: from n/a through <= 1.0.
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High 7.1
WordPress En Masse plugin <= 1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Matamko En Masse en-masse-wp allows Reflected XSS.This issue affects En Masse: from n/a through <= 1.0.
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High 7.1
WordPress Zielke Design Project Gallery plugin <= 2.5.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Terry Zielke Zielke Design Project Gallery zielke-design-project-gallery allows Reflected XSS.This issue affects Zielke Design Project Gallery: from n/a thro…
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High 7.1
WordPress custom-post-edit plugin <= 1.0.4 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Christopher Churchill custom-post-edit front-end-post-edit allows Reflected XSS.This issue affects custom-post-edit: from n/a through <= 1.0.4.
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High 7.1
WordPress LIVE TV plugin <= 1.2 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Omar Mohamed Mohamoud LIVE TV live-tv allows Reflected XSS.This issue affects LIVE TV: from n/a through <= 1.2.
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High 7.2
SOUND4 IMPACT/FIRST/PULSE/Eco <=2.x Unauthenticated Stored Cross-Site Scripting
SOUND4 IMPACT/FIRST/PULSE/Eco versions 2.x contains an unauthenticated stored cross-site scripting vulnerability in the username parameter that allows attackers to inject malicious scripts. Attackers can exploit the unvalidated username input to execute arbit…
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High 7.1
YOURLS is vulnerable to XSS through JSONP and Callback request parameters
### Summary The callback and **jsonp** request parameters are directly concatenated into the response without any sanitization that allowing attackers to inject arbitrary JS code. When **YOURLS_PRIVATE** is set to **false** (public API mode), this vulnerabili…
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High 7.3
A Stored Cross-Site Scripting (XSS) vulnerability exists in the Meeting location field of the Create/Edit Conference fu…
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High 7.1
WordPress Off Page SEO plugin <= 3.0.3 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jakub Glos Off Page SEO off-page-seo allows Reflected XSS.This issue affects Off Page SEO: from n/a through <= 3.0.3.
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High 7.1
WordPress Product Puller plugin <= 1.5.1 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Kemal YAZICI Product Puller product-puller allows Reflected XSS.This issue affects Product Puller: from n/a through <= 1.5.1.
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High 7.1
WordPress Sleekplan plugin <= 0.2.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in sleekplan Sleekplan sleekplan allows Reflected XSS.This issue affects Sleekplan: from n/a through <= 0.2.0.
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High 7.1
WordPress Ads24 Lite plugin <= 1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rakessh Ads24 Lite wp-ad-management allows Reflected XSS.This issue affects Ads24 Lite: from n/a through <= 1.0.
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High 7.1
WordPress Invelity SPS connect plugin <= 1.0.8 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in INVELITY Invelity SPS connect invelity-sps-connect allows Reflected XSS.This issue affects Invelity SPS connect: from n/a through <= 1.0.8.
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High 7.1
WordPress Advanced Custom CSS plugin <= 1.1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in prasadkirpekar Advanced Custom CSS advanced-custom-css allows Reflected XSS.This issue affects Advanced Custom CSS: from n/a through <= 1.1.0.
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High 7.1
WordPress Content Grid Slider plugin <= 1.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in councilsoft Content Grid Slider content-grid-slider allows Reflected XSS.This issue affects Content Grid Slider: from n/a through <= 1.5.
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High 7.3
Improper Neutralization of HTML Tags in a Web Page in libredesk
Libredesk is a self-hosted customer support desk. Prior to version 0.8.6-beta, LibreDesk is vulnerable to stored HTML injection in the contact notes feature. When adding notes via POST /api/v1/contacts/{id}/notes, the backend automatically wraps user input in…
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High 7.3
n8n's Possible Stored XSS in "Respond to Webhook" Node May Execute Outside iframe Sandbox
n8n is an open source workflow automation platform. Prior to version 1.114.0, a stored Cross-Site Scripting (XSS) vulnerability may occur in n8n when using the “Respond to Webhook” node. When this node responds with HTML content containing executable scripts,…
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High 7.6
XSS in Verisay Communication's Aidango
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Verisay Communication and Information Technology Industry and Trade Ltd. Co. Aidango allows Cross-Site Scripting (XSS). This issue affects Aidango: be…
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High 7.6
XSS in Verisay Communication's Trizbi
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Verisay Communication and Information Technology Industry and Trade Ltd. Co. Trizbi allows Cross-Site Scripting (XSS). This issue affects Trizbi: befo…
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High 7.6
XSS in Verisay Communication's Titarus
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Verisay Communication and Information Technology Industry and Trade Ltd. Co. Titarus allows Cross-Site Scripting (XSS). This issue affects Titarus: be…