Description
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.
Published: 2025-12-01
Score: 8.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v4hv-rgfq-gp49 Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes
History

Fri, 20 Feb 2026 16:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

 cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

Sat, 06 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

threat_severity

Important

Tue, 02 Dec 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 02 Dec 2025 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Angular
Angular angular
Vendors & Products Angular
Angular angular

Mon, 01 Dec 2025 22:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Angular Angular
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-02T14:13:07.801Z

Reserved: 2025-11-28T23:33:56.366Z

Link: CVE-2025-66412

cve-icon Vulnrichment

Updated: 2025-12-02T14:13:03.595Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-01T23:15:53.890

Modified: 2026-02-20T16:37:23.807

Link: CVE-2025-66412

cve-icon Redhat

Severity : Important

Publid Date: 2025-12-01T22:35:59Z

Links: CVE-2025-66412 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-12-02T11:58:52Z

Weaknesses