CVE-2025-66412: Angular

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Angular Angular: up to and including 18.2.14; from 19.0.0, before 19.2.17 (fixed in 19.2.17); from 20.0.0, before 20.3.15 (fixed in 20.3.15); from 21.0.0, before 21.0.2 (fixed in 21.0.2)

Published 2025-12-01. Last modified 2026-06-17.