Vulnerability · Published Sep 24, 2026 · Assigned by WPScan

CVE-2026-80338CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler

Medium 6.8

In plain English

A medium-severity missing authorization in CMB2 from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.2%top 90.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	CMB2	0 – before 2.13.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

References

https://wpscan.com/vulnerability/7402e0b0-54de-42b3-9032-ae225fb4e76a/ exploit, vdb-entry, technical-description