CVE-2021-21610

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

Published: Jan 13, 2021
Updated: May 9, 2024
CVE: CVE-2021-21610
GHSA: GHSA-7qf3-c2q8-69m3
Severity: Medium
Exploit:

CVSS v3:

Severity: Medium
Score: 6.1
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2:

Severity: Low
Score: 4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N

CWEs:

CWE-79

OWASP TOP 10:

A7 - Cross-Site Scripting (XSS)

Affected Software
References

Software	From	Fixed in
jenkins / jenkins	-	2.274.x
jenkins / jenkins	-	2.263.1.x
org.jenkins-ci.main / jenkins-core	-	2.263.2
org.jenkins-ci.main / jenkins-core	2.264	2.275

https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2153

Vulnerability Database

CVE-2021-21610

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