CVE-2026-1944CallbackKiller service widget <= 1.2 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Update
- 5.3MediumCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 68% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Wordfence
- 10 days later
· 10 days later
Published
- 53 days later
· 53 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 68% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
krellbat · CallbackKiller service widget
- affected ≤ 1.2
References
References5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/98a7572d-9642-4150-8112-c0fa2b25ae05?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L34 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L34 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L133 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L133 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-6057 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-1944)Record last updated .