CVE-2026-103694: Mobile builder privilege escalation vulnerability
high 8.8 plugin closed published 2026-10-11 · updated 2026-10-13
- Affected versions
- 1.4.2 and older
- Fixed in
- unknown
- Severity
- High · CVSS 8.8
- Active installs
- closed
- Type
- Privilege escalation
What an attacker needs
- Access: A low-level account on the site, such as a subscriber or customer (per the CVSS score).
CVSS vector (score by CISA ADP): CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do now
- Replace Mobile 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 Mobile 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 Mobile builder WordPress plugin through 1.4.2 does not properly restrict which user meta keys a logged-in user can update through one of its REST routes, allowing any user with a self-registered account, such as a customer, to grant themselves the administrator role.
References
- NVD CVE-2026-103694 nvd.nist.gov
- WPScan advisory wpscan.com
Related
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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/mobile-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.