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.
Published: 2026-09-24
Score: 6.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 24 Sep 2026 11:30:00 +0000

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'}


Thu, 24 Sep 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Cmb2
Cmb2 cmb2
Wordpress
Wordpress wordpress
Vendors & Products Cmb2
Cmb2 cmb2
Wordpress
Wordpress wordpress

Thu, 24 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Thu, 24 Sep 2026 06:15:00 +0000

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

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-09-24T10:41:56.075Z

Reserved: 2026-08-26T09:02:21.818Z

Link: CVE-2026-80338

cve-icon Vulnrichment

Updated: 2026-09-24T10:36:32.811Z

cve-icon NVD

Status : Received

Published: 2026-09-24T06:17:01.317

Modified: 2026-09-24T11:16:47.293

Link: CVE-2026-80338

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-24T12:30:18Z

Weaknesses