CVE-2026-14452: Open redirect and XSS via reset_url parameter
Improper validation of the reseturl parameter of the Setup in-page search in Checkmk <2.5.0p15, <2.4.0p38, <2.3.0p51 and 2.2.0 (EOL) allows an attacker to execute arbitrary script in the session of an authenticated user with Setup access, or to redirect that user to an arbitrary external site, by tricking the user into opening a crafted URL and clicking the Reset button or submitting an empty search.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Authenticated Checkmk users who have Setup access are the affected target population. Exploitation requires convincing one of those users to open a crafted URL and then click Reset or submit an empty in-page search.
Is this exploitable without user interaction?
No. The described attack requires social engineering: the attacker must trick an authenticated user with Setup access into following a crafted URL and performing one of the specified actions.
Which releases need to be remediated?
Affected releases are Checkmk versions earlier than 2.5.0p15, 2.4.0p38, and 2.3.0p51, as well as the end-of-life 2.2.0 release line.