Cross-site Scripting (XSS) Affecting conmon package, versions <2:2.0.21-1.rhaos4.5.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-RHEL7-CONMON-5251085
  • published26 Mar 2023
  • disclosed13 Jan 2021

Introduced: 13 Jan 2021

CVE-2021-21610  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:7 conmon to version 2:2.0.21-1.rhaos4.5.el7 or higher.
This issue was patched in RHSA-2021:0429.

NVD Description

Note: Versions mentioned in the description apply only to the upstream conmon package and not the conmon package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1