CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler (CVE-2026-80338) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80338

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

Answer in brief

CVE-2026-80338 records a Unknown severity vulnerability in CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler. The current sources do not mark it as known exploited. The current feed maps Unknown/CMB2 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 24, 2026First seen by HOL Sep 24, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/CMB2 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/CMB2generic	>=0 <2.13.0	2.13.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/CMB2.
Review the reported fix. Update Unknown/CMB2 to 2.13.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 24, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.