CVE-2026-1944 CallbackKiller service widget <= 1.2 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Update
Unauthenticated attackers can modify plugin site ID settings due to missing capability checks in the CallbackKiller WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1944?
CVE-2026-1944 is a medium-severity missing authorization vulnerability in krellbat CallbackKiller service widget, published on 14 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The CallbackKiller service widget plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the cbk_save() function in all versions up to, and including, 1.2. This makes it possible for unauthenticated attackers to modify the plugin's site ID settings via the 'cbk_save_v1' AJAX action.
Weakness: CWE-862
Which versions are affected by CVE-2026-1944?
How do I fix CVE-2026-1944?
No fix has been published for CVE-2026-1944 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1944 being exploited?
There is no known exploitation of CVE-2026-1944 in the wild and no public exploit code.
Sources
Also known as GHSA-8gh7-8v8f-6f45.