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OpenAdvisories
Medium · 5.3 CVE-2026-1944 EUVD-2026-6057GHSA-8gh7-8v8f-6f45

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

Published Feb 14, 2026 · Updated Apr 8, 2026 · Assigned by Wordfence

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.

Affected products

VendorProductAffectedFixed
krellbat CallbackKiller service widget ≤ 1.2 —

References