CVE-2021-21610

MEDIUM

Jenkins < 2.263.1, < 2.274 - Reflected Cross-Site Scripting via Markup Preview URL Parameter

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0033
EPSS Percentile 55.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (3)
jenkins/jenkins < 2.263.1
jenkins/jenkins < 2.274
org.jenkins-ci.main/jenkins-core 0 - 2.263.2Maven
Published Jan 13, 2021
Tracked Since Feb 18, 2026