CVE-2026-1944
CallbackKiller service widget <= 1.2 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Update
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | krellbat |
| Product | callbackkiller service widget |
| Published | Feb 14, 2026 |
| Last Updated | Apr 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for krellbat callbackkiller service widget
Be the first to know when new medium vulnerabilities affecting krellbat callbackkiller service widget are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
krellbat / CallbackKiller service widget
0 ≤ 1.2
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/98a7572d-9642-4150-8112-c0fa2b25ae05?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L34 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L34 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L133 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L133
Credits
Abhirup Konwar