CVE-2026-8833

XSS in urls PUBLISHED

Description (CNA)

Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows an authenticated user to bypass URL validation and inject malicious URLs such as javascript: URIs, resulting in cross-site scripting when another user interacts with the crafted link.

Affected (CNA)

Vendor / product	Versions
Checkmk GmbH / Checkmk	affected 2.5.0 before 2.5.0p5; affected 2.4.0 before 2.4.0p31; affected 2.3.0 before 2.3.0p48; affected 2.2.0

CWE

CWE-79

References

https://checkmk.com/werk/20002

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.