CVE-2021-4231

Name: CVE-2021-4231
Creator: NVD / NIST
Published: 2022-05-26T14:15:07.953+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2021-4231 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A vulnerability was found in Angular up to 11.0.4/11.1.0-next.2. It has been classified as problematic. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

1.05%

60.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Angular	Angular	11.1.0	Next0
Angularjs	Angularjs	< 11.0.5	—

References

https://github.com/angular/angular/commit/ba8da742e3b243e8f43d4c63aa842b44e14f2b09Patch, Third Party Advisory
https://github.com/angular/angular/issues/40136Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-ANGULARCORE-1070902Third Party Advisory
https://vuldb.com/?id.181356Third Party Advisory
https://github.com/angular/angular/commit/ba8da742e3b243e8f43d4c63aa842b44e14f2b09Patch, Third Party Advisory
https://github.com/angular/angular/issues/40136Third Party Advisory
https://security.snyk.io/vuln/SNYK-JS-ANGULARCORE-1070902Third Party Advisory
https://vuldb.com/?id.181356Third Party Advisory

Timeline

Published: May 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4231?

How severe is CVE-2021-4231?

CVE-2021-4231 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4231?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4231?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST