CVE-2026-80338
CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler
Unknown CMB2
CVSS
6.8MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.18%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 2.13.0CMB2CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
The CMB2 WordPress plugin before 2.13.0 does not perform any capability check on one of its AJAX actions, allowing users with a role as low as Subscriber to create arbitrary WordPress options and corrupt existing ones, which can break core site settings and take the site offline. Exploitation requires the site's or another CMB2 WordPress plugin before 2.13.0 to have declared an oEmbed field, as the CMB2 WordPress plugin before 2.13.0 registers none of its own. The stored value is never attacker-controlled, so the issue does not lead to privilege escalation.
Text from CVE List
Affected versions 1
- CMB2affected: all versions before 2.13.0CVE List