CVE-2026-94294: App Builder missing authorization check vulnerability

medium 5.3 plugin closed published 2026-10-19

Affected versions: 3.8.4 up to (not including) 5.7.1
Fixed in: 5.7.1
Severity: Medium · CVSS 5.3
Active installs: closed
Type: Missing authorization check

What an attacker needs

Access: None. No account or login is needed (per the CVSS score).

CVSS vector (score by WPScan): CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What to do now

Replace App Builder. A closed plugin gets no updates through WordPress, so this hole stays open.
Deactivate and delete it once you have a replacement (Plugins → Deactivate → Delete). Deactivating alone leaves its files on the server.
Not sure which version you run? Check your version against every known App Builder issue.
If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.

The advisory

The App Builder WordPress plugin before 5.7.1 does not require authentication or authorisation before writing attacker-supplied data to one of its options and, on a separate unauthenticated request, redirecting the visitor's browser to a URI built from that stored data.

Description from the CVE record, published by WPScan (the CVE Numbering Authority), via the NVD entry for CVE-2026-94294.

References

NVD CVE-2026-94294 nvd.nist.gov
WPScan advisory wpscan.com

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Where this data comes from

CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Versions and install counts: wordpress.org/plugins/app-builder (Plugins API), fetched 2026-11-04.
The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.