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Angular CVE-2025-66412

| EUVDEUVD-2025-200118 HIGH
Cross-site Scripting (XSS) (CWE-79)
2025-12-01 security-advisories@github.com GHSA-v4hv-rgfq-gp49
8.5
CVSS 4.0 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
8.5 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Ubuntu
MEDIUM
qualitative
Red Hat
8.1 HIGH
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
A
Scope
X

Lifecycle Timeline

8
Source Code Evidence Fetched
Jul 26, 2026 - 18:13 vuln.today
Severity Changed
Jun 02, 2026 - 14:22 NVD
MEDIUM HIGH
CVSS changed
Jun 02, 2026 - 14:22 NVD
5.4 (MEDIUM) 8.5 (HIGH)
EUVD ID Assigned
Mar 15, 2026 - 13:34 euvd
EUVD-2025-200118
Analysis Generated
Mar 15, 2026 - 13:34 vuln.today
Patch released
Mar 15, 2026 - 13:34 nvd
Patch available
CVE Published
Dec 01, 2025 - 23:15 github-advisory
HIGH 8.5
CVE Published
Dec 01, 2025 - 23:15 nvd
MEDIUM 5.4

DescriptionGitHub Advisory

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.

AnalysisAI

We need to produce a JSON with all the specified fields. I'll synthesize the data.

First, the product name: "Angular" is the main product. The vulnerability is in Angular Template Compiler. So "Angular" is sufficient as a single product name. But could also say "Angular Framework" but 1-3 words: "Angular" fits.

Summary: Must be original, not paraphrase description. Start with impact verb and product: "Stored Cross-Site Scripting in Angular Template Compiler versions 19.x prior to 19.2.17, 20.x prior to 20.3.15, 21.x prior to 21.0.2, and 18.x and earlier allows..." include that attacker can inject malicious scripts. Mention EPSS low, KEV not mentioned (so not in KEV), but POC? No explicit POC mention, but there is source code evidence, so likely not public exploit. "no public exploit identified at time of analysis". EPSS 0.04% low. Active exploitation? Not in KEV, but source code suggests a fix, and advisory from GitHub. No indication of active exploitation. So summary: "Stored Cross-Site Scripting (XSS) vulnerability in Angular's template compiler allows attackers to inject malicious JavaScript via specific URL-holding attributes and SVG animation elements, bypassing built-in sanitization." I'll craft more specifically.

Technical context: CWE-79, the underlying technology is Angular's template compiler and its security schema for sanitization of attribute bindings. Mention that the compiler's incomplete schema for URL-holding attributes (like xlink:href, math:href) and SVG animation attribute "attributeName" leads to bypassing sanitization. CPE strings show angular for node.js. The commit diff shows changes to validation functions (e.g., replacing validateIframeAttribute with validateAttribute, adding new test cases for SVG animation). So root cause is insufficient classification of attributes as requiring URL security context.

Risk assessment: Use CVSS vector given: 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/E:X... So vector: AV:N network,

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8.6 Sep 10

Server-Side Rendering in Angular's @angular/platform-server leaks server-side credentials to attacker-controlled origins

CVE-2026-22610 HIGH
8.5 Jan 10

Cross-site scripting in Angular's Template Compiler allows attackers to inject arbitrary JavaScript through unsanitized

CVE-2026-50178 HIGH
8.7 Jun 22

Command injection via untrusted Markdown rendering in the Angular Language Service VS Code extension (versions prior to

CVE-2026-49241 HIGH
8.7 Jun 22

Arbitrary code execution in the Angular Language Service VS Code extension prior to 21.2.4 allows attackers to silently

CVE-2026-41423 HIGH
8.7 May 08

Server-Side Request Forgery in Angular's @angular/platform-server (SSR) lets remote unauthenticated attackers hijack the

CVE-2026-88058 HIGH
8.6 Sep 10

Cross-site scripting in Angular's server-side rendering engine (`@angular/platform-server`) allows arbitrary JavaScript

CVE-2026-88060 HIGH POC
8.6 Sep 10

Cross-site scripting via Angular's server-side rendering package (@angular/platform-server) allows arbitrary JavaScript

CVE-2026-27970 HIGH
7.6 Feb 26

Cross-site scripting in Angular's internationalization (i18n) pipeline allows attacker-controlled JavaScript to execute

CVE-2026-88057 MEDIUM
5.3 Sep 10

Cross-site scripting in Angular's compiler and runtime (@angular/core, @angular/compiler) prior to versions 20.3.28, 21.

CVE-2026-88059 MEDIUM
4.0 Sep 10

HttpTransferCache in Angular's SSR stack leaks authenticated user data to subsequent unauthenticated visitors when hiera

CVE-2026-27739
Feb 25

The Angular SSR is a server-rise rendering tool for Angular applications. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17

CVE-2026-27738
Feb 25

The Angular SSR is a server-rise rendering tool for Angular applications. An Open Redirect vulnerability exists in the i

Vendor StatusVendor

Ubuntu

Priority: Medium
angular.js
Release Status Version
xenial needs-triage -
bionic needs-triage -
focal needs-triage -
jammy needs-triage -
noble needs-triage -
questing needs-triage -
upstream needs-triage -
plucky ignored end of life, was needs-triage

Debian

angular.js
Release Status Fixed Version Urgency
bullseye fixed 1.8.2-2 -
bullseye (security) fixed 1.8.3-1+deb12u1~deb11u1 -
bookworm fixed 1.8.3-1+deb12u1 -
forky, sid, trixie fixed 1.8.3-3 -
(unstable) not-affected - -

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CVE-2025-66412 vulnerability details – vuln.today

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