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
32,781 results · Feed
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Medium 5.4
phpMyFAQ before 4.1.8 Stored XSS via html_entity_decode
phpMyFAQ versions before 4.1.8 contain a stored cross-site scripting vulnerability in FaqHelper::convertOldInternalLinks() that calls html_entity_decode() on sanitized FAQ content, reversing entity-encoding protection. Authenticated users with FAQ editing pri…
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Medium 5.4
AVideo userLogin.php Reflected XSS via error parameter
AVideo through commit c91b5975d contains a reflected cross-site scripting vulnerability in userLogin.php that allows unauthenticated attackers to inject arbitrary JavaScript by closing the script tag with </script>. Attackers can craft a malicious URL with an…
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Medium 5.4
Interinfo｜DreamMaker - Reflected Cross-site Scripting
DreamMaker developed by Interinfo has a Reflected Cross-site Scripting vulnerability. Authenticated remote attackers can execute arbitrary JavaScript codes in user's browser via a malicious website.
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Medium 6.5
WordPress WoodMart theme < 8.3.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Xtemos WoodMart allows DOM-Based XSS. This issue affects WoodMart: from n/a before 8.3.8.
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Medium 6.1
Apache Allura: Stored XSS via code repositories
Apache Allura: stored XSS via SVN code repositories. Git repositories are not known to be affected. The vulnerability is likely mitigated via default CSP headers. This issue affects Apache Allura: through 1.20.0. Users are recommended to upgrade to version …
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Medium 6.1
Apache SkyWalking: CWE-79 stored XSS in Booster UI dashboard widgets (incomplete fix of CVE-2025-54057)
** UNSUPPORTED WHEN ASSIGNED ** Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache SkyWalking Booster UI. This issue affects Apache SkyWalking UI : from 10.2.0 through 10.4.0. Users are recommended to …
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Medium 6.1
Apache Allura: Stored XSS via markdown HTML processing
Stored XSS via markdown HTML processing in Apache Allura. This issue affects Apache Allura: from through 1.20.0. Users are recommended to upgrade to version 1.21.0, which fixes the issue.
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Low 3.5
Eleveo Quality Management Conversation Review cross site scripting
A vulnerability has been found in Eleveo Quality Management 9.7.0. This vulnerability affects unknown code of the component Conversation Review. The manipulation leads to cross site scripting. Remote exploitation of the attack is possible. The exploit has bee…
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Low 3.5
Eleveo Call Recording Software roleAddAction.do cross site scripting
A flaw has been found in Eleveo Call Recording Software 9.7.0. This affects an unknown part of the file /callrec/roleAddAction.do. Executing a manipulation of the argument name/username can lead to cross site scripting. The attack may be launched remotely. Th…
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Medium 4.3
light0011 cms Chapter Content Output oneChapter.tpl htmlspecialchars_decode cross site scripting
A vulnerability was detected in light0011 cms c774dce31c6df0055568a8d5c53d964d99be199d/f72cf46f601efb2a0618c3814cc2f61380b38930. Impacted is the function htmlspecialchars_decode of the file App/Home/View/Default/Chapter/oneChapter.tpl of the component Chapter…
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High 7.1CVE-2022-35499 Public exploit
In Trimble TM4WEB 21.4.0.4, the external bill viewer endpoint is vulnerable to reflected cross-site scripting via injec…
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Medium 5.4CVE-2022-35497 Public exploit
In Trimble TM4WEB 21.4.0.4 due to security misconfiguration with session identifiers, it is possible to recover valid s…
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Medium 5.4
Italtel NetMatch-S 5.0.0-20200703 allows Multiple Stored XSS under NP_IBCF-NATUP-01/NMSCI-WebGui/backup_restore.jsp and…
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Medium 6.1
Cross-site scripting (XSS) vulnerability in the /loginController/doLogin endpoint of the HubCore platform (version 14.1…
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Medium 5.4
Cross-Site Scripting (XSS) vulnerability in the RSS Widget of Netgate pfSense Plus (versions 26.03, 25.11.1) and pfSens…
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High 8.7
A reflected cross-site scripting (XSS) vulnerability exists in EMX Tecnologia Gestao X Business Suite 8.4 and earlier. …
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High 8.7
EMX Tecnologia Gestao X version <= 8.4 contains a Stored Cross-Site Scripting (XSS) vulnerability in the Help Chat func…
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Medium 5.4
Cross Site Scripting vulnerability in Netgate pfSense Plus software versions <= 26.03 pfSense CE software versions <= 2…
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Medium 6.1
MOOS core-moos through 10.4.0 MOOSDB HTTP Pages Stored Cross-Site Scripting
MOOS core-moos through 10.4.0 fails to escape database contents when rendering MOOSDB HTTP pages, allowing attackers to inject malicious scripts. Any MOOS publisher can set variable values containing script payloads that execute in the browser of operators vi…
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Critical 10.0
MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip
MapLibre GL JS is an interactive vector tile map library for web browsers. Prior to 6.4.1, DOM.sanitize() in src/util/dom.ts iterates elem.attributes as a live NamedNodeMap while removeAttributes() removes attributes from the same collection, shifting indexes…
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Low 3.5
itsourcecode Online Medicine Delivery System index.php cross site scripting
A vulnerability was identified in itsourcecode Online Medicine Delivery System 1.0. Impacted is an unknown function of the file /index.php?q=orderdetails. Such manipulation of the argument location leads to cross site scripting. The attack may be launched rem…
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Medium 5.4
LearnPress WordPress Plugin < 4.4.6 Stored XSS via Quiz Question Answer Titles
LearnPress WordPress Plugin before 4.4.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers with the Instructor role to inject persistent malicious payloads by submitting unsanitized input into quiz question answer title …
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Medium 6.5
WordPress Booking and Rental Manager plugin <= 2.7.7 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Magepeople inc. Booking and Rental Manager allows Stored XSS. This issue affects Booking and Rental Manager: from n/a through 2.7.7.
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Medium 6.5
WordPress WPKoi Templates for Elementor plugin <= 3.7.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPKoi WordPress Themes WPKoi Templates for Elementor allows DOM-Based XSS. This issue affects WPKoi Templates for Elementor: from n/a through 3.7.2.
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High 7.1
WordPress Quick Event Manager plugin <= 9.17 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Quick Event Manager <= 9.17 versions.
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High 7.1
WordPress BP Better Messages plugin <= 2.15.27 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in BP Better Messages <= 2.15.27 versions.
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Medium 6.1
WordPress WP Statistics plugin <= 14.16.11 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in WP Statistics <= 14.16.11 versions.
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High 7.2
WordPress EWWW Image Optimizer plugin <= 8.7.6 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in EWWW Image Optimizer <= 8.7.6 versions.
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High 7.1
WordPress Breadcrumb NavXT plugin <= 7.5.1 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Breadcrumb NavXT <= 7.5.1 versions.
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High 7.1
WordPress RTMKit plugin <= 2.1.5 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in RTMKit <= 2.1.5 versions.
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High 7.1
WordPress Ninja Forms File Uploads Extension plugin <= 3.3.26 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Ninja Forms File Uploads Extension <= 3.3.26 versions.
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High 7.1
WordPress WP QuickLaTeX plugin <= 3.8.8 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in WP QuickLaTeX <= 3.8.8 versions.
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High 7.1
WordPress Calculation For Contact Form 7 plugin <= 1.0 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Calculation For Contact Form 7 <= 1.0 versions.
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High 7.1
WordPress Under Construction plugin <= 5.82 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Under Construction <= 5.82 versions.
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High 7.1
WordPress Simple Payment plugin <= 2.5.1 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Simple Payment <= 2.5.1 versions.
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Medium 6.5
WordPress Product Variations Swatches for WooCommerce plugin <= 1.1.18 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in Product Variations Swatches for WooCommerce <= 1.1.18 versions.
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Medium 6.5
WordPress Graphene theme <= 2.9.4 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in Graphene <= 2.9.4 versions.
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Medium 5.3
MISP Dashboard Button Widget Allows Persistent JavaScript URL Injection
A persistent unsafe URL injection vulnerability exists in the MISP dashboard ButtonWidget configuration. Dashboard widget URLs were validated only when the widget was rendered and were not validated when the configuration was saved. As a result, an authentica…
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Medium 6.1
Reflected Cross-Site Scripting in MISP Event Filtering via taggedAttributes and galaxyAttachedAttributes Parameters
MISP contains a reflected Cross-Site Scripting (XSS) vulnerability in the event attribute filtering query builder. The taggedAttributes and galaxyAttachedAttributes URL parameters were inserted into the query-builder rules without HTML escaping before being s…
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Medium 5.4
pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_schedule_edit.php
pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_schedule_edit.php. The schedule description is stored without HTML sanitiz…