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 8.5
A cross-site scripting (XSS) vulnerability exists in the Blood Bank Management System 1.0 within the updateprofile.php …
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High 8.5
A cross-site scripting (XSS) vulnerability exists in the Blood Bank Management System 1.0 within the blooddinfo.php com…
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High 7.2
Unlimited Elements For Elementor and Unlimited Elements For Elementor (Premium) <= 2.0 - Unauthenticated Stored Cross-Site Scripting via SVG File Upload
The Unlimited Elements For Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 2.0 due to insufficient input sanitization and output escaping. This makes it possible for unauth…
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High 8.5
An issue was discovered in Logpoint before 7.7.0. Insufficient input validation and a lack of output escaping in multip…
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High 8.6
OWASP Java HTML Sanitizer is vulnerable to XSS via noscript tag and improper style tag sanitization
OWASP Java HTML Sanitizer is a configureable HTML Sanitizer written in Java, allowing inclusion of HTML authored by third-parties in web applications while protecting against XSS. In version 20240325.1, OWASP java html sanitizer is vulnerable to XSS if HtmlPo…
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High 7.0
XSS vulnerability when rendering filename in Webform Multiform
Webform Multiple File Upload module for Drupal 7.x contains a cross-site scripting (XSS) vulnerability in the file name renderer. An unauthenticated attacker can exploit this vulnerability by uploading a file with a malicious filename containing JavaScript co…
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High 7.1
Stored Cross-Site Scripting via XML Injection
Stored Cross-Site Scripting via XML Injection in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Stored XSS via crafted filenames injected into patc…
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High 7.9
Stored Cross-Site Scripting (XSS) in Dashboards in Guardian/CMC before 25.4.0
A Stored Cross-Site Scripting vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter. An authenticated low-privilege user can craft a malicious dashboard containing a JavaScript payload and share it with …
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High 8.1
HCL iNotes is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability,
HCL iNotes is susceptible to a Reflected Cross-site Scripting (XSS) vulnerability caused by improper validation of user-supplied input. A remote, unauthenticated attacker can specially craft a URL to execute script in a victim's Web browser within the securit…
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High 7.2
Telegram Bot & Channel <= 4.1 - Unauthenticated Stored Cross-Site Scripting via Telegram Username
The Telegram Bot & Channel plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Telegram username in all versions up to, and including, 4.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthentic…
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High 8.7
Stored Cross-site Scripting (XSS) vulnerability affecting Service Items Management in DELMIA Service Process Engineer on Release 3DEXPERIENCE R2025x
A stored Cross-site Scripting (XSS) vulnerability affecting Service Items Management in DELMIA Service Process Engineer on Release 3DEXPERIENCE R2025x allows an attacker to execute arbitrary script code in user's browser session.
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High 8.7
Stored Cross-site Scripting (XSS) vulnerability affecting Requirements in ENOVIA Product Manager from Release 3DEXPERIENCE R2023x through Release 3DEXPERIENCE R2025x
A stored Cross-site Scripting (XSS) vulnerability affecting Requirements in ENOVIA Product Manager from Release 3DEXPERIENCE R2023x through Release 3DEXPERIENCE R2025x allows an attacker to execute arbitrary script code in user's browser session.
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High 7.3
Cross-Site Scripting (XSS) in Looker's Extension Loader leading to Admin Account Compromise
An attacker with viewer permissions in Looker could craft a malicious URL that, when opened by a Looker admin, would execute an attacker-supplied script. Exploitation required at least one Looker extension installed on the instance. Looker-hosted and Self-hos…
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High 7.2
Simple User Registration <= 6.6 - Unauthenticated Stored Cross-Site Scripting
The Simple User Registration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wpr_admin_msg' parameter in all versions up to, and including, 6.6 due to insufficient input sanitization and output escaping. This makes it possible for u…
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High 7.1CVE-2025-13159 Public exploit
Flo Forms – Easy Drag & Drop Form Builder <= 1.0.43 - Unauthenticated Stored Cross-Site Scripting via SVG Upload
The Flo Forms – Easy Drag & Drop Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG file uploads in all versions up to, and including, 1.0.43. This is due to the plugin allowing SVG file uploads via an unauthenticated AJAX …
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High 7.2CVE-2025-12135 Public exploit
WPBookit <= 1.0.6 - Unauthenticated Stored Cross-Site Scripting
The WPBookit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'css_code' parameter in all versions up to, and including, 1.0.6 due to a missing capability check on the save_custome_code() function. This makes it possible for unauthent…
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High 8.3
Microsoft Defender Portal Spoofing Vulnerability
Microsoft Defender Portal Spoofing Vulnerability
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High 8.7
Improper input neutralization in the stats-conversions.php script in Revive Adserver 5.5.2 and 6.0.1 and earlier versio…
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High 7.2
XSS in Narkom Communication Technologies' Pyxis Signage
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Narkom Communication and Software Technologies Trade Ltd. Co. Pyxis Signage allows Stored XSS. This issue affects Pyxis Signage: through 31012025.
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High 7.1CVE-2025-64764 Scanner template
Astro is vulnerable to Reflected XSS via the server islands feature
Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component template(s). This issue has been patched in versi…
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High 7.2
GiveWP - Donation Plugin and Fundraising Platform <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via 'name'
The GiveWP – Donation Plugin and Fundraising Platform plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘name’ parameter in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This make…
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High 7.2
Giveaways and Contests by RafflePress – Get More Website Traffic, Email Subscribers, and Social Followers <= 1.12.19 - Unauthenticated Stored Cross-Site Scripting
The Giveaways and Contests by RafflePress – Get More Website Traffic, Email Subscribers, and Social Followers plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple social media username parameters in all versions up to, and including,…
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High 8.4
Emby Server is Vulnerable to Remote Code Execution Through XSS in Admin Dashboard
Emby Server is a personal media server. Prior to version 4.8.1.0 and prior to Beta version 4.9.0.0-beta, a malicious user can send an authentication request with a manipulated X-Emby-Client value, which gets added to the devices section of the admin dashboard…
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High 7.2
Checkout Files Upload for WooCommerce <= 2.2.1 - Unauthenticated Stored Cross-Site Scripting
The Checkout Files Upload for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via file uploads in all versions up to, and including, 2.2.1 due to insufficient input sanitization and output escaping. This makes it possible for una…
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High 7.2CVE-2025-12904 Public exploit
SNORDIAN's H5PxAPIkatchu <= 0.4.17 - Unauthenticated Stored Cross-Site Scripting via insert_data
The SNORDIAN's H5PxAPIkatchu plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'insert_data' AJAX endpoint in all versions up to, and including, 0.4.17 due to insufficient input sanitization and output escaping. This makes it possible …
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High 8.1
Vega Cross-Site Scripting (XSS) via expressions abusing toString calls in environments using the VEGA_DEBUG global variable
Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. In Vega prior to version 6.2.0, applications meeting 2 conditions are at risk of arbitrary JavaScript code execution, even if "safe mode…
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High 7.2
Easy Email Subscription <= 1.3 - Unauthenticated Stored Cross-Site Scripting
The Easy Email Subscription plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name' parameter in all versions up to, and including, 1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthentic…
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High 7.3
Stored XSS in DivvyDrive Information Technologies' Digital Corporate Warehouse
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in DivvyDrive Information Technologies Inc. Digital Corporate Warehouse allows Stored XSS. This issue affects Digital Corporate Warehouse: before v.4.8.2…
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High 8.7
Dynamics 365 Field Service (online) Spoofing Vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Dynamics 365 Field Service (online) allows an authorized attacker to perform spoofing over a network.
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High 8.7
Dynamics 365 Field Service (online) Spoofing Vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Dynamics 365 Field Service (online) allows an authorized attacker to perform spoofing over a network.
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High 7.3
Stored XSS
Zohocorp ManageEngine Exchange Reporter Plus versions 5723 and below are vulnerable to the Stored XSS Vulnerability in the Custom report.
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High 7.3
Stored XSS
Zohocorp ManageEngine Exchange Reporter Plus versions 5723 and below are vulnerable to the Stored XSS Vulnerability in the Public Folders report.
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High 7.3
Stored XSS
Zohocorp ManageEngine Exchange Reporter Plus versions 5723 and below are vulnerable to the Stored XSS Vulnerability in the Folder Message Count and Size report.
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High 7.3
Stored XSS
Zohocorp ManageEngine Exchange Reporter Plus versions 5723 and below are vulnerable to the Stored XSS Vulnerability in the Mails Deleted or Moved report.
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High 8.6
DOM-based Cross-Site Scripting was identified in GitHub Enterprise Server Issues search allows privilege escalation and unauthorized workflow triggers
An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allows DOM-based cross-site scripting via Issues search label filter that could lead to privilege escalation and unauthorized workflow triggers. Successful explo…
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High 7.6
ProsemirrorToHtml: Cross-Site Scripting vulnerability through unescaped HTML attribute values
ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the `prosemirror_to_html` gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag c…
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High 7.1
Combodo iTop vulnerable to reflected XSS in webservices/export.php
Combodo iTop is a web based IT service management tool. Versions prior to 2.7.13 and 3.2.2 are vulnerable to a cross-site scripting attack (leading to JS execution) when editing the URL parameter. Versions 2.7.13 and 3.2.2 don't use export.php, which was depr…
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High 8.8
Combodo iTop vulnerable to reflected XSS via objection edition form error
Combodo iTop is a web based IT service management tool. Versions prior to 2.7.13 and 3.2.2 are vulnerable to cross-site scripting when a field with an error contains malicious content. Versions 2.7.13 and 3.2.2 protect rendered HTML content.
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High 8.5
Combodo iTop has stored XSS in user portal's browse brick
Combodo iTop is a web based IT service management tool. In versions prior to 3.2.2, when displaying content in a browse brick in the user portal, a cross-site scripting attack can occur. This is fixed in versions 3.2.2 and 3.3.0.
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High 8.8
Combodo iTop vulnerable to reflected XSS in ajax.render.php render_dashboard
Combodo iTop is a web based IT service management tool. Versions prior to 2.7.13 and 3.2.2 are vulnerable to cross-site scripting when a dashboard is rendered via an AJAX call. Versions 2.7.13 and 3.2.2 sanitize the var responsible for the attack.