CVE-2026-80338

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

Published Sep 24, 2026 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-862
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cmb2
Cmb2 cmb2
Wordpress
Wordpress wordpress
Vendors & Products Cmb2
Cmb2 cmb2
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
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.
Title CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Sep 24, 2026, 10:41 AM
Reserved
Aug 26, 2026, 9:02 AM
Status
Deferred
Published
Sep 24, 2026, 6:17 AM
Modified
Sep 24, 2026, 2:42 PM