Angular up to 19.2.16/20.3.14/21.0.1 cross site scripting

Summaryinfo

A vulnerability was found in Angular up to 19.2.16/20.3.14/21.0.1. It has been rated as problematic. Affected by this issue is some unknown functionality. Performing a manipulation results in cross site scripting. This vulnerability is known as CVE-2025-66412. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Angular up to 19.2.16/20.3.14/21.0.1. It has been classified as problematic. This affects an unknown function. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. 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. This is going to have an impact on integrity. The summary by CVE is:

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 21.0.2, 20.3.15, and 19.2.17, A Stored Cross-Site Scripting (XSS) vulnerability has been identified in the Angular Template Compiler. It occurs because the compiler's internal security schema is incomplete, allowing attackers to bypass Angular's built-in security sanitization. Specifically, the schema fails to classify certain URL-holding attributes (e.g., those that could contain javascript: URLs) as requiring strict URL security, enabling the injection of malicious scripts. This vulnerability is fixed in 21.0.2, 20.3.15, and 19.2.17.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-66412 since 11/29/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 277591 (Linux Distros Unpatched Vulnerability : CVE-2025-66412), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 19.2.17, 20.3.15 or 21.0.2 eliminates this vulnerability. Applying the patch 1c6b0704fb63d051fab8acff84d076abfbc4893a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (277591) and CERT Bund (WID-SEC-2025-2708). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• NetApp ActiveIQ Unified Manager
• Open Source Angular

Productinfo

Type

• JavaScript Library

Name

• Angular

Version

• 19.2.0
• 19.2.1
• 19.2.2
• 19.2.3
• 19.2.4
• 19.2.5
• 19.2.6
• 19.2.7
• 19.2.8
• 19.2.9
• 19.2.10
• 19.2.11
• 19.2.12
• 19.2.13
• 19.2.14
• 19.2.15
• 19.2.16
• 20.3.0
• 20.3.1
• 20.3.2
• 20.3.3
• 20.3.4
• 20.3.5
• 20.3.6
• 20.3.7
• 20.3.8
• 20.3.9
• 20.3.10
• 20.3.11
• 20.3.12
• 20.3.13
• 20.3.14
• 21.0.0
• 21.0.1

License

• open-source

Website

• Product: https://github.com/angular/angular/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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