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
21,916 results · Clear filters · Feed
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Medium 4.6
SafeDelete - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-140
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal SafeDelete allows Stored XSS. This issue affects SafeDelete versions: from 0.0.0 to 1.0.88.
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Medium 4.6
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-155
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Cross-Site Scripting (XSS). This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.6
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-158
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Cross-Site Scripting (XSS). This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.6
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-159
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Cross-Site Scripting (XSS). This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.2
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-160
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Cross-Site Scripting (XSS). This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.6
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-163
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Stored XSS. This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.6
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-172
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Stored XSS. This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Medium 4.6
Diba carousel slider - Moderately critical - Cross Site Scripting (XSS) - SA-CONTRIB-2026-191
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Diba carousel slider allows Stored XSS. This issue affects Diba carousel slider versions: from 0.0.0 to 3.0.2.
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Medium 6.1
A reflected cross-site scripting (XSS) vulnerability in localstack v4.9.2 allows attackers to execute arbitrary Javascr…
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Medium 5.7
Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
In Splunk SOAR versions below 8.7.0, a user that holds a role with the install_apps capability could store attacker-controlled content that Splunk SOAR displays in app documentation by installing an app. If another user who holds a role with permission to vie…
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Medium 5.4
Nuxt server islands render `useHeadSafe` input without sanitisation
Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input …
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Medium 6.5
Astro: Reflected/Stored XSS via unescaped <script>/<style> tag content in JSX/MDX rendering
Astro is a web framework for content-driven websites. Prior to 7.3.2, Astro's JSX and MDX rendering pipeline treats string children of script and style elements as trusted HTML without distinguishing compiler-generated literal content from dynamic expression …
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Medium 6.1
odf-kit: HTML injection leading to XSS in odtToHtml() via unescaped style attribute values
odf-kit allows users to generate, fill, read, and convert OpenDocument Format files (.odt, .ods) in TypeScript and JavaScript. Starting in version 0.6.0 and prior to version 0.14.2, he renderer has an `escapeHtml()` helper and applies it consistently to text …
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Medium 6.5
WordPress Contest Gallery plugin <= 34.0.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wasiliy Strecker Contest Gallery contest-gallery allows Stored XSS.This issue affects Contest Gallery: from n/a through 34.0.1.
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Medium 6.1
Cross-Site Scripting via Authentication Endpoint in Multiple WSO2 Products Enables UI Manipulation and Redirection
The Authentication Endpoint accepts user-supplied input without sufficient encoding, allowing for the injection of malicious JavaScript payloads. This vulnerability can be triggered by submitting crafted input to the Authentication Endpoint. Successful exploi…
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Medium 6.1
PHPPresentation 1.2.0 XSS via Writer\HTML Text Runs, Hyperlinks and Descriptions
PHPOffice PHPPresentation 1.2.0 contains a cross-site scripting vulnerability in the HTML writer that allows attackers who supply presentation content to inject script into generated HTML. Attackers can craft a PPTX with malicious text runs, hyperlink relatio…
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Medium 6.1
e107 CMS before 2.3.13 Reflected XSS via search.php author Parameter
e107 CMS before 2.3.13 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious HTML by manipulating the author GET parameter in search.php, which is parsed with parse_str() and concatenated unescaped i…
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Medium 6.8
Elementor < 4.3.5 - Contributor+ Stored XSS via SVG CDATA Sanitizer Bypass
The Elementor Website Builder WordPress plugin before 4.3.5 does not sanitize the text content of SVG files, checking only their elements and attributes, allowing users with the Contributor role and above to store a payload which breaks out when the SVG is re…
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Medium 6.4
Elementor < 4.3.5 - Author+ Stored XSS via SVG Upload
The Elementor Website Builder WordPress plugin before 4.3.5 does not sanitize uploaded SVG files on every upload route, allowing users with the Author role and above to upload a file containing JavaScript, which will run in the browser of any user who opens i…
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Medium 6.8
WP Job Openings < 4.1.1 - Author+ Stored XSS via Job Title
The HireZoot WordPress plugin before 4.1.1 does not sanitise and escape some of its stored data before outputting it in the admin dashboard, and additionally reverses the HTML-entity encoding that would otherwise neutralise it, allowing users with the Author …
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Medium 4.3
itsourcecode Online Cake Ordering System 404.php cross site scripting
A vulnerability has been found in itsourcecode Online Cake Ordering System 1.0. Affected by this issue is some unknown functionality of the file /404.php. Such manipulation of the argument useruid leads to cross site scripting. The attack may be performed fro…
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Medium 4.7
SvelteKit before 3.0.0 XSS via Cache-Control Header in Prerendered Pages
SvelteKit (@sveltejs/kit) before 3.0.0 contains a cross-site scripting vulnerability in prerendered pages because a cache-control header value set via setHeaders is inserted without escaping into a <meta http-equiv="cache-control"> tag. An attacker who can in…
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Medium 6.1
IBM vulnerable to cross-site scripting (XSS) via unsanitized title truncation
IBM Carbon Charts 0.4.0 through 1.27.19 is vulnerable to cross-site scripting. The MeterChart component's Title.truncateTitle() function re-inserts a substring of user-supplied label text into the DOM via an unsanitized innerHTML write when the title exceeds …
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Medium 6.1
JavaMelody < 1.60.0 Reflected XSS via monitoring graph parameter
JavaMelody before 1.60.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying crafted values in the graph parameter of /monitoring?part=graph. Attackers can include a closing script tag in…
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Medium 6.1
Blogroll Fun WordPress Plugin < 0.8.5 Reflected XSS via blogroll.php
Blogroll Fun plugin for WordPress before 0.8.5 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the 'k' parameter in blogroll.php. Attackers can craft GET requests to /wp-content/plugins/b…
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Medium 6.1
DedeCMS 5.6 / 5.7 Reflected XSS via adminDirHand in config.php
DedeCMS 5.6 and 5.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying unsanitized input to the adminDirHand parameter. Attackers can send crafted GET requests to /include/dialog/config.…
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Medium 6.1
SocialFit WordPress Plugin 1.2.2 Reflected XSS via popup.php msg Parameter
SocialFit plugin for WordPress through 1.2.2 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the unsanitized msg parameter. Attackers can craft GET requests to /wp-content/plugins/socialfit/p…
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Medium 6.1
Custom Tables WordPress Plugin < 3.4.6 Reflected XSS via iframe.php
Custom Tables plugin for WordPress before 3.4.6 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the unsanitized 'key' parameter in iframe.php. Attackers can craft GET requests to /wp-cont…
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Medium 6.1
K-news WordPress Plugin < 1.1.1 Reflected XSS via fontpicker index.php ff Parameter
K-news plugin for WordPress before 1.1.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying unsanitized input through the 'ff' parameter. Attackers can craft GET requests to /wp-content/…
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Medium 4.8
Cachet has Stored XSS in Incident Component
Cachet is an open-source status page system. Versions 2.4.1 and earlier have a stored Cross-Site Scripting (XSS) vulnerability in the incident creation form, allowing an authenticated attacker to inject malicious HTML/JavaScript that executes in the browser o…
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Medium 6.5
Stored XSS in the VPN logs monitor
A Stored Cross-Site Scripting vulnerability exists in the SNS VPN log monitoring screen.
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Medium 5.4
ApostropheCMS: Incomplete CVE-2026-53606: `meta http-equiv=refresh` `content` still ships `javascript:` / `data:` URLs
ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Prior to sanitize-html 2.18.0, a non-default configuration that allows meta refresh elements and their http-equiv and conte…
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Medium 6.1
ApostropheCMS: Client-side Prototype Pollution in apos.http.parseQuery leading to DOM-based XSS against authenticated users
ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, an unauthenticated attacker can send a crafted link whose query string is automatically parsed by apos.http.parseQuery when an authenticated victim loads a page with the admin…
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Medium 5.3
ApostropheCMS sanitize-html: nonTextTags discard region ends early on an implied close, letting <noscript> content render
ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Prior to sanitize-html 2.18.0, a non-default nonTextTags configuration that includes noscript can end its discard region ea…
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Medium 4.6
SolarWinds Observability Self-Hosted Cross-Site Scripting Vulnerability
SolarWinds Observability Self-Hosted was found to be affected by a stored Cross-Site Scripting (XSS) vulnerability that allows authenticated attackers to inject malicious content or JavaScript, which is displayed or executed in the browsers of other authentic…
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Medium 5.4
ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does not apply HTML-attribute…
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Medium 6.1
VPL for Moodle before 5.0.0 Reflected XSS via similarity/diff.php filename
VPL (Virtual Programming Lab) for Moodle before 5.0.0 contains a reflected cross-site scripting vulnerability that allows remote attackers to inject script via unencoded filename1/filename2 parameters in similarity/diff.php. Attackers can craft a diff.php lin…
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Medium 5.4
ApostropheCMS: Color field validation bypass allows stored XSS via HTML appended after rgb()/hsl() prefix
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, the color field accepts trailing content after a valid rgb() or hsl() prefix because its TinyColor validation does not require the entire value to match a color. An authentica…
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Medium 6.5
WordPress Rootblox plugin <= 1.0.7 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CozyThemes Rootblox rootblox allows Stored XSS.This issue affects Rootblox: from n/a through 1.0.7.
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Medium 6.5
WordPress SureCart plugin <= 4.9.5 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Brainstorm Force SureCart surecart allows Stored XSS.This issue affects SureCart: from n/a through 4.9.5.