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
32,780 results · Feed
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High 7.1
Joomla! Core - [20260916] - Core - XSS filter bypass in InputFilter via whitespace characters in HTML data URIs in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3
Joomla! Core - [20260916] - Core - XSS filter bypass in InputFilter via whitespace characters in HTML data URIs in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The cleanAttribute method removes HTML data URIs, however injected whitespaces characters could circumvent tha…
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Medium 5.9
Joomla! Core - [20260901] - XSS in HTMLHelper::link method in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3
Joomla! Core - [20260901] - XSS in HTMLHelper::link method in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - Lack of escaping leads to XSS vulnerabilities in the link method of the HTML Helper.
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Medium 6.1
Flow colon-separator and flow-guidedtour-optin-welcome-description messages allow stored XSS
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Flow Extension allows Stored XSS. This issue affects Mediawiki - Flow Extension: from * before 1.46.1, 1.45.5, 1.43.1…
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Low 2.3
Serialize JavaScript: Cross-site scripting (XSS) via unescaped </script> in serialized function bodies
Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. From 7.1.1 until 7.1.2, function values serialized by serialize-javascript are not fully protected against script-closing tags in attacker…
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Critical 9.6
Webmin: Reflected XSS in the Configuration module
Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.650, Webmin users who click on a malicious link to their server are vulnerable to this XSS vulnerability that could be used to execute attacker-controlled commands. Thi…
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Low 2.1
HTML injection
Malicious HTML content could be injected into the help texts of various fields with organizer permissions.
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High 8.2
HPE OneView - Cross-site scripting vulnerability
A security vulnerability in HPE OneView may be exploited remotely to perform session hijacking, data theft or other unauthorized actions.
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High 8.2
HPE OneView - Cross-site scripting vulnerability
A potential security vulnerability in HPE OneView can be exploited to allow remote session hijacking or other unauthorized actions.
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High 8.7
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of…
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Medium 4.3
coolbeans1212 MateisHomePage-Website users.php cross site scripting
A flaw has been found in coolbeans1212 MateisHomePage-Website up to ea2a4226deeca27ab1fb9df0552ec76444547811. Affected by this issue is some unknown functionality of the file users.php. This manipulation of the argument Search causes cross site scripting. The…
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Low 3.5
CodeCanyon Rocket LMS Student Profile Image Upload cross site scripting
A vulnerability was determined in CodeCanyon Rocket LMS up to 2.2. This affects an unknown function of the component Student Profile Image Upload. Executing a manipulation can lead to cross site scripting. The attack can be executed remotely. The exploit has …
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Low 3.5
mwasikz robo-cafe-rms Edit Profile Feature update-account.php cross site scripting
A vulnerability was found in mwasikz robo-cafe-rms up to 228c44a02823f04e85db32b7137809a2856148fc. The impacted element is an unknown function of the file frontend/update-account.php of the component Edit Profile Feature. Performing a manipulation of the argu…
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High 7.2
HT Contact Form – Drag & Drop Form Builder for WordPress <= 2.10.2 Unauthenticated Stored Cross-Site Scripting via Rich Text Editor Field
The HT Contact Form – Drag & Drop Form Builder for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Rich Text Editor Field in all versions up to, and including, 2.10.2 due to insufficient input sanitization and output escapi…
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Medium 6.1
GestSup before 3.2.62 Stored XSS via Double-Decoded Email Subject in OAuth IMAP Connector
GestSup versions before 3.2.62 contain a stored cross-site scripting vulnerability in the IMAP OAuth connector that double-decodes MIME-encoded email subjects after HTML escaping. Unauthenticated attackers can send crafted emails to monitored mailboxes with n…
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Medium 6.1
GestSup before 3.2.61 Stored XSS via Email Body in LOGIN IMAP Connector
GestSup versions before 3.2.61 fail to properly sanitize HTML email bodies in the IMAP LOGIN connector, allowing unauthenticated attackers to store arbitrary JavaScript in ticket descriptions and replies. Attackers can send emails to the monitored mailbox con…
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Medium 5.4
Cross Site Scripting vulnerability in Greek Universities Network (GUnet) Open eClass Platform v.3.15 allows a remote at…
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Medium 6.1
httpdbg before 2.2.1 Stored Cross-Site Scripting via javascript URL
httpdbg before 2.2.1 fails to validate URL schemes in recorded HTTP request URLs rendered as clickable links in the web interface. Attackers controlling traffic recorded by httpdbg can supply javascript: scheme URLs that execute malicious scripts in the appli…
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Low 3.5
Eleveo Call Recording Software Play Audio audio.jsp cross site scripting
A flaw has been found in Eleveo Call Recording Software 9.7.0. Affected is an unknown function of the file /callrec/audio.jsp of the component Play Audio Page. Executing a manipulation of the argument viewRoleId/cfType can lead to cross site scripting. The at…
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Medium 5.3
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Book Library (Free) < 6.4.6
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Book Library (Free) < 6.4.6 - The public book-detail page template, site/views/view_book/tmpl/default.php, echoes the raw title request parameter directly into a double-quoted HTML attribute …
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Medium 5.3
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Vehicle Manager (Free) < 6.5.8
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Vehicle Manager (Free) < 6.5.8 - The public vehicle-detail page (task=view) echoes the title request parameter directly into a double-quoted HTML attribute with no output encoding of any kind…
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Medium 5.3
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Real Estate Manager (Free) < 6.7.9
Joomla Extension - ordasoft.com - Reflected Cross-Site Scripting in Real Estate Manager (Free) < 6.7.9 - The public property-detail page’s “leave a review” form repopulates its title field directly from the request with no escaping and no filtering function o…
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Critical 9.6
Unauthenticated update of public UI settings leading to stored cross-site scripting in Rancher
An unauthenticated update of public UI settings could be used by remote attackers to execute a stored cross-site scripting attack in the Rancher UI, in SUSE Rancher 2.15 before 2.15.2, 2.14 before 2.14.6, 2.13 before 2.13.10, 2.12 before 2.12.14 and 2.11 befo…
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Medium 5.1
Multiple Reflected XSS in Dayforce ESS Excelity
Dayforce ESS Excelity is vulnerable to Reflected XSS in multiple endpoints. An attacker can prepare a specially crafted URL that, when opened, results in arbitrary JavaScript execution in the victim's browser. This issue was fixed in version V4.
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Medium 4.1
HTML Injection in Enocta Educational's Enocta Platform
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Enocta Educational Technologies Inc. Enocta Platform allows XSS Targeting HTML Attributes. This issue affects Enocta Platform: through 2026-09-28.
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Medium 6.1
HTML Injection in Rolantis Information Technologies' Agentis
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. Agentis allows XSS Targeting HTML Attributes. This issue affects Agentis: from 4.44 bef…
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Medium 4.8
Stored Cross-Site Scripting (XSS) in TPVEnlanube
Stored Cross-Site Scripting (XSS) in TPVEnlanube affecting the following endpoint and parameter: * CVE-2026-7171: parameter 'Apellido 1' in the endpoint '/administrator/index.php?page=admin.user_add&user_id=45&option=com_virtuemart'. Successful exploitation …
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Medium 4.8
Stored Cross-Site Scripting (XSS) in TPVEnlanube
Stored Cross-Site Scripting (XSS) in TPVEnlanube affecting the following endpoint and parameter: * CVE-2026-7172: parameter 'Nombre Completo' in the endpoint '/administrator/index.php?option=com_virtuemart&page=admin.user_list'. Successful exploitation of th…
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Medium 4.8
Stored Cross-Site Scripting (XSS) in TPVEnlanube
Stored Cross-Site Scripting (XSS) in TPVEnlanube affecting the following endpoint and parameter: * CVE-2026-7170: parameter 'vendor_store_name' in the endpoint '/administrator/index.php?pshop_mode=admin&page=store.store_add&option=com_virtuemart&vendor_id=[I…
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Medium 6.1
Apache Roller: Stored XSS in comment moderation via comment author URL
Improper neutralization of input in Apache Roller 6.1.5 allows an anonymous remote attacker to store a crafted comment-author URL that can execute script in the session of a weblog moderator or global administrator when the comment management page is viewed. …
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Medium 5.4
Stored XSS in BİMSER's eBA Plus
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Bimser Solution Software Trade Inc. EBA Plus Document and Workflow Management System allows Stored XSS. This issue affects eBA Plus Document and Workflow Man…
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Medium 5.4
Apache Roller: Stored cross-site scripting in the authoring UI
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a user with authoring rights on a weblog to store crafted content that is later written into the authoring UI's JavaScript string literals and m…
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Medium 6.1
Apache Roller: Reflected cross-site scripting in the frontpage directory parameter
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a remote attacker to perform reflected cross-site scripting against a visitor to a weblog using the bundled frontpage theme, by supplying a craf…
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Medium 5.4
Apache Roller: Stored cross-site scripting via uploaded media content type
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a user with media-upload rights to store active content on Roller's origin, because the media upload feature trusts the upload-supplied content …
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Medium 6.1
Apache Roller: Stored cross-site scripting through incoming Trackback links
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an unauthenticated remote attacker to store a crafted comment-author URL through the incoming Trackback endpoint when a published entry accepts …
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Medium 6.1
Apache Roller: Stored javascript: URI in HTML comments
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows an anonymous remote attacker to store a comment containing a javascript: URI link that survives HTML comment formatting and can execute script i…
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Medium 6.1
Apache Roller: Reflected XSS in the optional LDAP comment authenticator
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Roller 6.1.5 allows a remote attacker to perform reflected cross-site scripting through the optional LDAP comment authenticator, which writes request parameter valu…
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High 7.5
Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0
Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0 - Tabs & Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code pa…
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Low 3.5
amirsanni mini-inventory-and-sales-management-system Items Management Items.php cross site scripting
A security vulnerability has been detected in amirsanni mini-inventory-and-sales-management-system up to 81bf0b55f5933f3b0dbb1583204a612e06605b95. Impacted is an unknown function of the file application/controllers/Items.php of the component Items Management …
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Low 2.4
Krayin laravel-crm Admin Settings Endpoint index.blade.php cross site scripting
A vulnerability was detected in Krayin laravel-crm up to 2.2.5. Impacted is an unknown function of the file packages/Webkul/Admin/src/Resources/views/components/layouts/index.blade.php of the component Admin Settings Endpoint. Performing a manipulation of the…
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Low 2.6
zhistaredu StarTraining application.yml cross site scripting
A security vulnerability has been detected in zhistaredu StarTraining up to 3.8.1. This issue affects some unknown processing of the file application.yml. Such manipulation of the argument xss.enabled leads to cross site scripting. It is possible to launch th…