PT-2021-14662 · Jenkins · Jenkins Claim Plugin+1

Wadeck Follonier · Published 2021-02-24 · Updated 2023-11-03 · CVE-2021-21619

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins Claim Plugin versions 2.18.1 and earlier

Description The issue is related to a stored cross-site scripting (XSS) vulnerability. It occurs because the Jenkins Claim Plugin does not escape the user display name, allowing attackers who can control the display names of Jenkins users to exploit this vulnerability. This can be done either via the security realm or directly inside Jenkins. Everyone with a Jenkins account can change their own display name, potentially exploiting this issue.

Recommendations For Jenkins Claim Plugin versions 2.18.1 and earlier, update to version 2.18.2 or later, which escapes the user display name shown in claims, thus resolving the stored cross-site scripting (XSS) vulnerability.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-21619

GHSA-48HR-JG4P-W4P4

Affected Products

Jenkins

Jenkins Claim Plugin

References · 11

• https://osv.dev/vulnerability/GHSA-48hr-jg4p-w4p4 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21619 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21619 · Security Note
• https://jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20%281%29 · Vendor Advisory
• https://github.com/jenkinsci/claim-plugin · Note
• https://t.me/cibsecurity/24074 · Telegram Post
• https://t.me/cvenotify/60419 · Telegram Post
• https://jenkins.io/security/advisory/2021-02-24/#SECURITY-2188%20(1) · Note
• https://t.me/cvenotify/10446 · Telegram Post
• http://openwall.com/lists/oss-security/2021/02/24/3 · Note
• https://t.me/cvenotify/10625 · Telegram Post