Security readout for executives and security teams
Plain-English summary
CVE-2026-1944 affects the CallbackKiller service widget WordPress plugin through version 1.2. An unauthenticated visitor may change the plugin’s site ID setting. This is not described as data theft or site takeover, but it can alter how the widget behaves and may disrupt lead-capture or callback functionality.
Executive priority
Treat as a moderate website integrity issue. Prioritize sites using this plugin for customer callback or lead workflows, because unauthorized setting changes could affect customer engagement. It is lower urgency than remote code execution or data exposure issues.
Technical view
The plugin lacks an authorization check in cbk_save(). The CVE states unauthenticated attackers can modify plugin site ID settings through the cbk_save_v1 AJAX action. The issue is CWE-862 with CVSS 3.1 score 5.3, reflecting network access, low complexity, no privileges, and low integrity impact.
Likely exposure
Exposure is limited to WordPress sites running CallbackKiller service widget versions up to and including 1.2. The sources do not identify other affected products or confirm whether a fixed version exists.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not state active exploitation. Exploitation requires public reachability of the vulnerable WordPress AJAX action, but the documented impact is limited to unauthorized settings modification.
Researcher notes
Evidence comes from the CVE record and Wordfence entry. WordPress Trac references show the relevant plugin file locations, including the vulnerable function and AJAX-related code. No patch confirmation, exploit publication, or active exploitation signal is provided in the source bundle.
Mitigation direction
- Inventory WordPress sites for CallbackKiller service widget installations.
- If installed at version 1.2 or earlier, check vendor guidance for updates or fixes.
- Disable or remove the plugin if it is not business-critical.
- Review the plugin site ID setting for unauthorized changes.
Validation and detection
- Confirm whether the plugin is installed and identify its version.
- Review plugin settings for unexpected site ID values.
- Check WordPress logs for suspicious unauthenticated AJAX activity related to the plugin.
- Monitor Wordfence and WordPress plugin sources for fix status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-1944 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/98a7572d-9642-4150-8112-c0fa2b25ae05?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/trunk/callbackkiller-widget.php#L34CVE reference
- https://plugins.trac.wordpress.org/browser/callbackkiller-service-widget/tags/1.2/callbackkiller-widget.php#L34CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.