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Vulnerability record · CVE-2021-4231 · published 26 May 2022

CVE-2021-4231: Angular cross-site scripting vulnerability

Angular · Angular

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.

5.4 CVSS 3.1 Medium EPSS 1.2% · top 34.1% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-4231), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.