IM
IronMonkey Threat Research

CVE-2025-66412 HIGH

Published: 2025-12-01 | Last Modified: 2026-06-02 | Status: Modified

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.

CVSS Metrics

Base Score: 5.4 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionREQUIRED
ScopeCHANGED
Confidentiality ImpactLOW
Integrity ImpactLOW
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 2.3

Impact Score: 2.7

Base Score: 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

Attack VectorNETWORK
Attack ComplexityLOW
Attack RequirementsNONE
Privileges RequiredLOW
User InteractionACTIVE
Vulnerability ConfidentialityHIGH
Vulnerability IntegrityHIGH
Vulnerability AvailabilityHIGH
Subsequent ConfidentialityNONE
Subsequent IntegrityNONE
Subsequent AvailabilityNONE

Source: [email protected]

Type: Secondary

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-79

Affected Products

Vendor Product Version Update Type
angular angular * <built-in method update of dict object at 0x7f76027f7000> Application
angular angular * <built-in method update of dict object at 0x7f76027f6580> Application
angular angular * <built-in method update of dict object at 0x7f76027f7400> Application
angular angular * <built-in method update of dict object at 0x7f76394ce580> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*
Yes cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*
Yes cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*
Yes cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*

References

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