High
Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-66412
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:03 UTC · Revision 1
Source evidence
Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes
core-osv · Original sourcePublished 1 Dec 2025, 22:35 UTC
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.
osv:CVE-2025-66412
Complete source record
{
"id": "49eb57c88f9dfa11102e8087cc5b9e2d4ac4605ecc1c366767560df51e1b41d2",
"url": "https://osv.dev/vulnerability/CVE-2025-66412",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes",
"summary": "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.",
"evidence": "osv:CVE-2025-66412",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2025-66412",
"aliases": [
"CVE-2025-66412",
"GHSA-v4hv-rgfq-gp49"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
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"2.0.0-alpha.14",
"2.0.0-alpha.13"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66412.json"
}
}
],
"modified": "2026-10-28T02:30:37.099319424Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-253495.html",
"https://cert-portal.siemens.com/productcert/html/ssa-485750.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66412.json",
"https://github.com/angular/angular/security/advisories/GHSA-v4hv-rgfq-gp49",
"https://nvd.nist.gov/vuln/detail/CVE-2025-66412",
"https://github.com/angular/angular/commit/1c6b0704fb63d051fab8acff84d076abfbc4893a"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "GitHub_M",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": ">= 21.0.0-next.0 < 21.0.2"
},
{
"last_affected": ">= 21.0.0-next.0 < 21.0.2"
},
{
"introduced": ">= 20.0.0-next.0 < 20.3.15"
},
{
"last_affected": ">= 20.0.0-next.0 < 20.3.15"
},
{
"introduced": ">= 19.0.0-next.0 < 19.2.17"
},
{
"last_affected": ">= 19.0.0-next.0 < 19.2.17"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66412.json"
}
},
"related_cves": [
{
"value": "CVE-2025-66412",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 504458,
"published_at": "2025-12-01T22:35:59.211+00:00"
}