What’s Vulnerable › Vulnerabilities

CVE-2021-4231: Angular Comment cross site scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-26 · updated 2026-06-17
• Weakness: CWE-79

Description

A vulnerability was found in Angular up to 11.0.4/11.1.0-next.2. It has been classified as problematic. Affected is the handling of comments. The manipulation leads to cross site scripting. It is possible to launch the attack remotely but it might require an authentication first. Upgrading to version 11.0.5 and 11.1.0-next.3 is able to address this issue. The name of the patch is ba8da742e3b243e8f43d4c63aa842b44e14f2b09. It is recommended to upgrade the affected component.

Affected products

• angular: 11.1.0-next0, 11.1.0-next1, 11.1.0-next2
• angularjs: before 11.0.5 — fixed in 11.0.5

How to fix

Upgrade to a fixed version: angularjs 11.0.5. Check the vendor advisory for mitigations.

References

• https://github.com/angular/angular/commit/ba8da742e3b243e8f43d4c63aa842b44e14f2b09
• https://github.com/angular/angular/issues/40136
• https://security.snyk.io/vuln/SNYK-JS-ANGULARCORE-1070902
• https://vuldb.com/?id.181356
• https://github.com/angular/angular/commit/ba8da742e3b243e8f43d4c63aa842b44e14f2b09
• https://github.com/angular/angular/issues/40136
• https://security.snyk.io/vuln/SNYK-JS-ANGULARCORE-1070902
• https://vuldb.com/?id.181356

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