CVE-2026-1944

CallbackKiller service widget <= 1.2 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Update

CVSS 5.3 MEDIUMEPSS 0.3%CWE-862

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

14 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

krellbat · CallbackKiller service widget

References

https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L133 https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L34 https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L133 https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L34 https://www.wordfence.com/threat-intel/vulnerabilities/id/98a7572d-9642-4150-8112-c0fa2b25ae05?source=cve