CVE-2026-80338: medium-severity vulnerability in CMB2
CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.8epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Affected products
Unknown · CMB2public PoCs found — 1
cve_referencewpscan.com/vulnerability/7402e0b0-54de-42b3-9032-ae225fb4e76a/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.