CVE-2021-32857: Cockpit vulnerable to Cross-site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-02-21 · updated 2026-06-17
Weakness: CWE-79

Description

Cockpit is a content management system that allows addition of content management functionality to any site. In versions 0.12.2 and prior, bad HTML sanitization in `htmleditor.js` may lead to cross-site scripting (XSS) issues. There are no known patches for this issue.

Affected products

cockpit-hq/cockpit: through 0.12.2

References

https://github.com/agentejo/cockpit/blob/f7cd602bcc6134657ccfeb4e400b0050943dd243/assets/lib/uikit/js/components/htmleditor.js
https://github.com/agentejo/cockpit/commit/0c6628cbff3e49bc317c97b03a4666b3a75f76cc
https://securitylab.github.com/advisories/GHSL-2021-1035_Cockpit_Next/
https://github.com/agentejo/cockpit/blob/f7cd602bcc6134657ccfeb4e400b0050943dd243/assets/lib/uikit/js/components/htmleditor.js
https://github.com/agentejo/cockpit/commit/0c6628cbff3e49bc317c97b03a4666b3a75f76cc
https://securitylab.github.com/advisories/GHSL-2021-1035_Cockpit_Next/

Get alerted when CVE-2021-32857 or the next vulnerability affects your stack