What is CVE-2026-1944?

CVE-2026-1944 is a medium-severity vulnerability in Krellbat Callbackkiller Service Widget, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-02-14.

How severe is CVE-2026-1944?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Krellbat Callbackkiller Service Widget

CVE-2026-1944

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.

Vulnerability class: Broken Access Control

EPSS: 0.003 (26.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: 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 — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-1944?: CVE-2026-1944 is a medium-severity vulnerability in Krellbat Callbackkiller Service Widget, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-02-14.
How severe is CVE-2026-1944?: Medium severity. CVSS v3 base score is 5.3 out of 10.