CVE-2025-2596 Session logout can be overwritten by long lasting request
Attackers can maintain active sessions after logout by exploiting a race condition in Checkmk, bypassing session termination controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-2596?
CVE-2025-2596 is a low-severity vulnerability in Checkmk Checkmk, published on 26 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Session logout could be overwritten in Checkmk GmbH's Checkmk versions <2.3.0p30, <2.2.0p41, and 2.1.0p49 (EOL)
Weakness: CWE-613
Which versions are affected by CVE-2025-2596?
It affects 1 product.
Products include Checkmk Checkmk.
How do I fix CVE-2025-2596?
No fix has been published for CVE-2025-2596 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-2596 being exploited?
There is no known exploitation of CVE-2025-2596 in the wild and no public exploit code.
Other vulnerabilities in Checkmk Checkmk
- CVE-2025-39666 omd: Local privilege escalation when executing omd commands as root
- CVE-2024-8606 Fix 2FA bypass via RestAPI
- CVE-2022-46836 PHP code injection in watolib
- CVE-2025-32919 Privilege Escalation in Windows License plugin for Checkmk Windows Agent
- CVE-2024-28827 Privilege escalation in Windows agent
Sources
Also known as GHSA-f4hc-mpg9-vm8w, UBUNTU-CVE-2025-2596.