CVE-2021-21684

Published: Oct 6, 2021Modified: Jun 17, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: NVD

Description

Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability.

Affected (1)

Products: Jenkins: Git

Jenkins

1 product

Git

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Jenkins Git	Up to 4.8.2

Related CWEs

CWE-116

Improper Encoding or Escaping of Output

The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

References (4)

http://www.openwall.com/lists/oss-security/2021/10/06/1

Source: jenkinsci-cert@googlegroups.com

Mailing ListThird Party Advisory

https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499

Source: jenkinsci-cert@googlegroups.com

Vendor Advisory

http://www.openwall.com/lists/oss-security/2021/10/06/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.