CVE-2021-21690

Name: CVE-2021-21690
Creator: NVD / NIST
Published: 2021-11-04T17:15:08.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.45%

Last modified Jun 17, 2026

CVE-2021-21690 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.. EPSS estimates a 2.45% chance of exploitation in the next 30 days.

Description

Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.45%

82.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	< 2.303.3
Jenkins	Jenkins	< 2.319

References

https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455Vendor Advisory
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455Vendor Advisory

Timeline

Published: Nov 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21690?

Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.

How severe is CVE-2021-21690?

CVE-2021-21690 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21690?

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-2021-21690?

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

Scan your code now

Source: NVD / NIST