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 Traveler theme < 3.2.3 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in shinetheme Traveler traveler allows Reflected XSS.This issue affects Traveler: from n/a through < 3.2.3.
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High 8.6
Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes
The EmbedVideo Extension is a MediaWiki extension which adds a parser function called #ev and various parser tags for embedding video clips from various video sharing services. In versions 4.0.0 and prior, the EmbedVideo extension allows adding arbitrary attr…
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High 8.9
Stored XSS in Proliz Software's OBS
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in PROLIZ Computer Software Hardware Service Trade Ltd. Co. OBS (Student Affairs Information System) allows Stored XSS. This issue affects OBS (Student A…
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High 7.7
Horilla has Improper Input Sanitization Leading to XSS and Admin Account Takeover
Horilla is a free and open source Human Resource Management System (HRMS). Prior to version 1.4.0, improper sanitization across the application allows XSS via uploaded SVG (and via allowed <embed>), which can be chained to execute JavaScript whenever users vi…
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High 7.7
Horilla Stored XSS Vulnerability via File Upload in Reimbursement Panel
Horilla is a free and open source Human Resource Management System (HRMS). Prior to version 1.4.0, the file upload flow performs validation only in the browser and does not enforce server-side checks. An attacker can bypass the client-side validation (for exa…
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High 8.7
HTML Payload Stored Cross-Site Scripting (XSS) Vulnerability
A maliciously crafted HTML payload, when rendered by the Autodesk Fusion desktop application, can trigger a Stored Cross-site Scripting (XSS) vulnerability. A malicious actor may leverage this vulnerability to read local files or execute arbitrary code in the…
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High 8.9
Stored XSS in Netcad Software's Netigma
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Netcad Software Inc. Netigma allows Stored XSS. This issue affects Netigma: from 6.3.3 before 6.3.5 V8.
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High 8.2
Mesh Connect JS SDK Vulnerable to Cross Site Scripting via createLink.openLink
Mesh Connect JS SDK contains JS libraries for integrating with Mesh Connect. Prior to version 3.3.2, the lack of sanitization of URLs protocols in the createLink.openLink function enables the execution of arbitrary JavaScript code within the context of the pa…
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High 7.1
WordPress VikRestaurants Table Reservations and Take-Away plugin <= 1.5 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e4jvikwp VikRestaurants vikrestaurants allows Reflected XSS.This issue affects VikRestaurants: from n/a through <= 1.5.
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High 7.1
WordPress Auction Feed plugin <= 1.1.4 - Cross Site Request Forgery (CSRF) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in morganrichards Auction Feed auction-feed allows Stored XSS.This issue affects Auction Feed: from n/a through <= 1.1.4.
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High 7.3CVE-2025-55888 Public exploit
Cross-Site Scripting (XSS) vulnerability was discovered in the Ajax transaction manager endpoint of ARD. An attacker ca…
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High 7.1
Sitecore Experience Platform Cross-Site Scripting Vulnerability
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Sitecore Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Cross-Site Scripting (XSS).This issue affects Sitecore Experience …
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High 7.1
Reflected XSS in Vizly Web Design's Real Estate Packages
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Vizly Web Design Real Estate Packages allows Content Spoofing, CAPEC - 593 - Session Hijacking, CAPEC - 591 - Reflected XSS. This issue affects Real E…
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High 7.3CVE-2025-59424 Public exploit
LinkAce Vulnerable to Stored XSS on the Audit Page
LinkAce is a self-hosted archive to collect website links. Prior to 2.3.1, a Stored Cross-Site Scripting (XSS) vulnerability has been identified on the /system/audit page. The application fails to properly sanitize the username field before it is rendered in …
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High 7.1
XSS in Dokuzsoft Technology's E-Commerce Web Design Product
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Dokuzsoft Technology E-Commerce Web Design Product allows XSS Through HTTP Headers. This issue affects E-Commerce Web Design Product: before 11.08.202…
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High 8.1
Spoofing issue in the Site Permissions component
Spoofing issue in the Site Permissions component. This vulnerability was fixed in Firefox 143 and Thunderbird 143.
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High 8.6
3DAlloy allows stored XSS through attributes provided to the 3d parser tag/function
3DAlloy is a lightWeight 3D-viewer for MediaWiki. From 1.0 through 1.8, the <3d> parser tag and the {{#3d}} parser function allow users to provide custom attributes that are then appended to the canvas HTML element that is being output by the extension. The a…
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High 7.0
Stored cross-site scripting vulnerability in M-Files Hubshare before version 25.8 allows authenticated attackers to cau…
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High 8.8
Shopware: Reflective Cross Site-Scripting (XSS) in CMS components
### Impact By exploiting XSS vulnerabilities, malicious actors can perform harmful actions in the user's web browser in the session context of the affected user. Some examples of this include, but are not limited to: - Obtaining user session tokens. - Perform…
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High 7.1
wabac.js has XSS vulnerability in 404 error handling logic
wabac.js provides a full web archive replay system, or 'wayback machine', using Service Workers. A Reflected Cross-Site Scripting (XSS) vulnerability exists in the 404 error handling logic of wabac.js v2.23.10 and below. The parameter `requestURL` (derived fr…
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High 8.6
listmonk Vulnerable to CSRF to XSS Chain That Can Lead to Admin Account Takeover
listmonk is a standalone, self-hosted, newsletter and mailing list manager. In versions up to and including 1.1.0, every http request in addition to the session cookie `session` there included `nonce`. The value is not checked and validated by the backend, re…
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High 7.1
WordPress WooCommerce Photo Reviews plugin <= 1.3.13 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in villatheme WooCommerce Photo Reviews woocommerce-photo-reviews.This issue affects WooCommerce Photo Reviews: from n/a through <= 1.3.13.
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High 7.1
WordPress Blog Designer PRO plugin <= 3.4.7 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in solwin Blog Designer PRO blog-designer-pro.This issue affects Blog Designer PRO: from n/a through <= 3.4.7.
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High 8.6
MCP Inspector is Vulnerable to Potential Command Execution via XSS When Connecting to an Untrusted MCP Server
The MCP inspector is a developer tool for testing and debugging MCP servers. A cross-site scripting issue was reported in versions of the MCP Inspector local development tool prior to 0.16.6 when connecting to untrusted remote MCP servers with a malicious red…
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High 8.4
LinkAce has a Stored One Click XSS vulnerability
LinkAce is a self-hosted archive to collect website links. A stored cross-site scripting (XSS) vulnerability was discovered in versions prior to 2.1.9 that allows an attacker to inject arbitrary JavaScript, which is then executed in the context of a user's br…
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High 8.1CVE-2025-55998 Public exploit
A cross-site scripting (XSS) vulnerability in Smart Search & Filter Shopify and BigCommerce apps allows a remote attack…
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High 8.8
N8N's Chat Trigger component is vulnerable to XSS
An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3, v1.100.1, and v1.101.1 allows attackers to execute arbitrary code via uploading a crafted HTML file.
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High 7.1
WordPress Assistant Plugin <= 1.5.2 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Beaver Builder WordPress Assistant assistant allows Reflected XSS.This issue affects WordPress Assistant: from n/a through <= 1.5.2.
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High 7.1
WordPress Table of content Plugin <= 1.5.3.1 - Cross Site Request Forgery (CSRF) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in KaizenCoders Table of content content-table allows Stored XSS.This issue affects Table of content: from n/a through <= 1.5.3.1.
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High 8.2
Promptcraft Forge Studio: Complete Sanitizer Bypass Enables XSS via Overlapping Patterns
Promptcraft Forge Studio is a toolkit for evaluating, optimizing, and maintaining LLM-powered applications. All versions of Promptcraft Forge Studio sanitize user input using regex blacklists such as r`eplace(/javascript:/gi, '')`. Because the package uses mu…
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High 7.6CVE-2025-45805 Public exploit
In phpgurukul Doctor Appointment Management System 1.0, an authenticated doctor user can inject arbitrary JavaScript co…
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High 8.8
phpgurukul Complaint Management System 2.0 is vulnerable to Cross Site Scripting (XSS) in admin/userprofile.php via the…
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High 7.2
phpgurukul Complaint Management System in PHP 2.0 is vulnerable to Cross Site Scripting (XSS) in admin/subcategory.php …
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High 8.8
DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepse…
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High 7.1
License Center
A cross-site scripting (XSS) vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to bypass security mechanisms or read application data.…
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High 7.8
Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a cr…
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High 7.1
WordPress Golo Theme <= 1.7.1 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in uxper Golo golo allows Reflected XSS.This issue affects Golo: from n/a through <= 1.7.1.
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High 7.1
WordPress Captcha.eu Plugin < 1.0.61 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in captcha.eu Captcha.eu captcha-eu allows Reflected XSS.This issue affects Captcha.eu: from n/a through < 1.0.61.
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High 7.1
WordPress Theme Blvd Widget Areas Plugin <= 1.3.0 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jason Theme Blvd Widget Areas theme-blvd-widget-areas allows Reflected XSS.This issue affects Theme Blvd Widget Areas: from n/a through <= 1.3.0.
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High 7.1
WordPress e-Boekhouden.nl Plugin <= 1.9.3 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in eboekhouden e-Boekhouden.nl e-boekhoudennl-connector allows Reflected XSS.This issue affects e-Boekhouden.nl: from n/a through <= 1.9.3.