CVE-2026-13355 Meta Box AIO - Privilege Escalation

Meta Box AIO plugin for WordPress <= 3.11.0 contains a privilege escalation caused by lack of authorization checks in populate_via_query_string() and improper role validation in mb-user-profile component, letting unauthenticated attackers escalate to Administrator via crafted shortcode injection.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-269

Vendor fix

Update to a version later than 3.11.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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