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
935 results · Clear filters · Feed
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Medium 6.1CVE-2025-56537 Public exploit
A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 and fixed in v.7.0 allows attackers to execut…
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Medium 6.1CVE-2025-56534 Public exploit
A cross-site scripting (XSS) vulnerability in the custom authenticator driver of opennebula v6.10.0.1 allows attackers …
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Medium 6.1CVE-2025-56536 Public exploit
A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scr…
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Medium 6.1CVE-2025-56535 Public exploit
A cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or…
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Low 3.5CVE-2026-7222 Public exploit
code-projects Coaching Management System Complaint Form complaint.php cross site scripting
A vulnerability was determined in code-projects Coaching Management System 1.0. Affected by this vulnerability is an unknown functionality of the file /cims/modules/student/complaint.php of the component Complaint Form Page. This manipulation of the argument …
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Medium 6.1CVE-2026-37750 Public exploit
A reflected Cross-Site Scripting (XSS) vulnerability in School Management System by mahmoudai1 allows unauthenticated r…
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Medium 4.3CVE-2026-7089 Public exploit
code-projects Home Service System Appointment Booking booking.php cross site scripting
A security vulnerability has been detected in code-projects Home Service System 1.0. The impacted element is an unknown function of the file /booking.php of the component Appointment Booking. The manipulation of the argument fname/lname leads to cross site sc…
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Medium 6.1CVE-2026-29971 Public exploit
A reflected cross-site scripting (XSS) vulnerability exists in WebFileSys version before 2.32.0 and fixed in v.2.32.0. …
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Medium 5.3CVE-2026-41472 Public exploit
CyberPanel < 2.4.5 Stored XSS via AI Scanner Dashboard
CyberPanel versions prior to 2.4.5 contain a stored cross-site scripting vulnerability in the AI Scanner dashboard where the POST /api/ai-scanner/callback endpoint lacks authentication and allows unauthenticated attackers to inject malicious JavaScript by ove…
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Medium 5.1CVE-2026-41456 Public exploit
Bludit CMS Reflected XSS via Search Plugin
Bludit CMS prior to commit 6732dde contains a reflected cross-site scripting vulnerability in the search plugin that allows unauthenticated attackers to inject arbitrary JavaScript by crafting a malicious search query. Attackers can execute malicious scripts …
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High 8.9CVE-2026-40487 Public exploit
Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS
Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the `Content-Type` header. The uploade…
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Medium 5.3CVE-2026-40179 Public exploit
Prometheus: Stored XSS via metric names and label values in web UI tooltips and metrics explorer
Prometheus is an open-source monitoring system and time series database. Versions 3.0 through 3.5.1 and 3.6.0 through 3.11.1 have stored cross-site scripting vulnerabilities in multiple components of the Prometheus web UI where metric names and label values a…
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Medium 5.4CVE-2026-34212 Public exploit
Docmost page content has stored XSS via unsanitized attachment URLs
Docmost is open-source collaborative wiki and documentation software. In versions prior to 0.71.0, improper neutralization of attachment URLs in Docmost allows a low-privileged authenticated user to store a malicious `javascript:` URL inside an attachment nod…
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Medium 6.1CVE-2025-69993 Public exploit
Leaflet versions up to and including 1.9.4 are vulnerable to Cross-Site Scripting (XSS) via the bindPopup() method. Thi…
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Low 2.4CVE-2026-6184 Public exploit
code-projects Simple Content Management System welcome.php cross site scripting
A weakness has been identified in code-projects Simple Content Management System 1.0. This affects an unknown part of the file /web/admin/welcome.php. Executing a manipulation of the argument News Title can lead to cross site scripting. The attack can be exec…
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High 8.0CVE-2026-31281 Public exploit
Totara LMS v19.1.5 and before is vulnerable to HTML Injection. An attacker can inject malicious HTML code in a message …
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High 7.3CVE-2026-35455 Public exploit
immich has Stored XSS via OCR Text in 360° Panorama Viewer
immich is a high performance self-hosted photo and video management solution. Prior to 2.7.0, sStored Cross-Site Scripting (XSS) in the 360° panorama viewer allows any authenticated user to execute arbitrary JavaScript in the browser of any other user who vie…
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Medium 6.5CVE-2026-39636 Public exploit
WordPress Livemesh Addons for Elementor plugin <= 9.0 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in livemesh Livemesh Addons for Elementor addons-for-elementor allows Stored XSS.This issue affects Livemesh Addons for Elementor: from n/a through <= 9.0.
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Medium 4.7CVE-2026-4406 Public exploit
Gravity Forms <= 2.9.30 - Reflected Cross-Site Scripting via 'form_ids' Parameter
The Gravity Forms plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `form_ids` parameter in the `gform_get_config` AJAX action in all versions up to, and including, 2.9.30. This is due to the `GFCommon::send_json()` method outputtin…
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High 8.6CVE-2026-39338 Public exploit
ChurchCRM has Blind XSS via Global Search – Administrative Cookie Session Exfiltration
ChurchCRM is an open-source church management system. Prior to 7.1.0, a Blind Reflected Cross-Site Scripting vulnerability exists in the search parameter accepted by the ChurchCRM dashboard. The application fails to sanitize or encode user-supplied input prio…
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Medium 4.3CVE-2026-5615 Public exploit
givanz Vvvebjs File Upload Endpoint upload.php cross site scripting
A weakness has been identified in givanz Vvvebjs up to 2.0.5. The affected element is an unknown function of the file upload.php of the component File Upload Endpoint. This manipulation of the argument uploadAllowExtensions causes cross site scripting. Remote…
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Medium 6.4CVE-2026-2600 Public exploit
ElementsKit Elementor Addons and Templates <= 3.7.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Simple Tab Widget
The ElementsKit Elementor Addons and Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ekit_tab_title' parameter in the Simple Tab widget in all versions up to, and including, 3.7.9 due to insufficient input sanitization and…
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Medium 6.1CVE-2026-30252 Public exploit
Multiple reflected cross-site scripting (XSS) vulnerabilities in the login.php endpoint of Interzen Consulting S.r.l Ze…
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Medium 6.1CVE-2026-30251 Public exploit
A reflected cross-site scripting (XSS) vulnerability in the login_newpwd.php endpoint of Interzen Consulting S.r.l ZenS…
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Medium 5.4CVE-2026-29598 Public exploit
Multiple stored cross-site scripting (XSS) vulnerabilities in the submit_add_user.asp endpoint of DDSN Interactive Acor…
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Medium 6.1CVE-2026-30082 Public exploit
Multiple stored cross-site scripting (XSS) vulnerabilities in the Edit feature of the Software Package List page of Ing…
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High 8.2CVE-2026-33331 Public exploit
oRPC: Stored XSS in OpenAPI Reference Plugin via unescaped JSON.stringify
oRPC is an tool that helps build APIs that are end-to-end type-safe and adhere to OpenAPI standards. Prior to version 1.13.9, a stored cross-site scripting (XSS) vulnerability exists in the OpenAPI documentation generation of orpc. If an attacker can control …
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Medium 5.4CVE-2024-46878 Public exploit
A Cross-Site Scripting (XSS) vulnerability exists in the page parameter of tiki-editpage.php in Tiki version 26.3 and e…
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Medium 5.4CVE-2024-46879 Public exploit
A Reflected Cross-Site Scripting (XSS) vulnerability exists in the POST request data zipPath of tiki-admin_system.php i…
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Medium 6.1CVE-2025-52204 Public exploit
A Cross-Site Scripting (XSS) vulnerability exists in Znuny::ITSM 6.5.x in the customer.pl endpoint via the OTRSCustomer…
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Medium 6.4CVE-2026-3333 Public exploit
MinhNhut Link Gateway <= 3.6.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
The MinhNhut Link Gateway plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'linkgate' shortcode in all versions up to, and including, 3.6.1 due to insufficient input sanitization and output escaping on user supplied attribute…
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Medium 6.4CVE-2026-3516 Public exploit
Contact List <= 3.0.18 - Authenticated (Contributor+) Stored Cross-Site Scripting via '_cl_map_iframe' Parameter
The Contact List plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '_cl_map_iframe' parameter in all versions up to, and including, 3.0.18. This is due to insufficient input sanitization and output escaping when handling the Google Map…
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Medium 5.3CVE-2026-33067 Public exploit
SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata
SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fiel…
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Low 3.6CVE-2026-32722 Public exploit
Memray-generated HTML reports vulnerable to Stored XSS via unescaped command-line metadata
Memray is a memory profiler for Python. Prior to Memray 1.19.2, Memray rendered the command line of the tracked process directly into generated HTML reports without escaping. Because there was no escaping, attacker-controlled command line arguments were inser…
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Medium 5.4CVE-2026-30048 Public exploit
NotChatbot WebChat has a stored cross-site scripting (XSS) vulnerability
A stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4. User-supplied input is not properly sanitized before being stored and rendered in the chat conversation history. This allows an attacker to inject arbitrary …
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Medium 6.1CVE-2026-30695 Public exploit
A Cross-Site Scripting (XSS) vulnerability exists in the web-based configuration interface of Zucchetti Axess access co…
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High 8.6CVE-2026-32635 Public exploit
Angular has XSS in i18n attribute bindings
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-next.3, 21.2.4, 20.3.18, and 19.2.20, a Cross-Site Scripting (XSS) vulnerability has been identified in the Ang…
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Medium 6.4CVE-2026-3228 Public exploit
NextScripts: Social Networks Auto-Poster <= 4.4.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'nxs_fbembed' Shortcode
The NextScripts: Social Networks Auto-Poster plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `[nxs_fbembed]` shortcode in all versions up to, and including, 4.4.6. This is due to insufficient input sanitization and output escaping on…
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Critical 9.1CVE-2026-30862 Public exploit
Critical Stored XSS & Privilege Escalation in Appsmith
Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.96, a Critical Stored XSS vulnerability exists in the Table Widget (TableWidgetV2). The root cause is a lack of HTML sanitization in the React component rendering pipelin…
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High 8.6CVE-2025-66024 Public exploit
XWiki Blog Application home page vulnerable to Stored XSS via Post Title
The XWiki blog application allows users of the XWiki platform to create and manage blog posts. Versions starting with 9.15 and prior to 9.15.7 are vulnerable to Stored Cross-Site Scripting (XSS) via the Blog Post Title. The vulnerability arises because the po…