Ad Inserter 2.8.12 - 2.8.18 - Subscriber+ RCE / Stored XSS via Global Custom Fields (CVE-2026-81655) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-81655

Ad Inserter 2.8.12 - 2.8.18 - Subscriber+ RCE / Stored XSS via Global Custom Fields

Answer in brief

CVE-2026-81655 records a Unknown severity vulnerability in Ad Inserter 2.8.12 - 2.8.18 - Subscriber+ RCE / Stored XSS via Global Custom Fields. The current sources do not mark it as known exploited. The current feed maps Unknown/Ad Inserter (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 27, 2026Updated Sep 27, 2026Source checked Sep 27, 2026First seen by HOL Sep 27, 2026Material review Sep 27, 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/Ad Inserter (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Ad Insertergeneric	>=2.8.12 <2.8.19	2.8.19

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Ad Inserter.
Review the reported fix. Update Unknown/Ad Inserter to 2.8.19 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 27, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The Ad Inserter WordPress plugin before 2.8.19 does not correctly restrict access to one of its settings pages, making it reachable by every logged in user under a configuration its own settings allow, and does not filter the content saved there, allowing users with a role as low as subscriber to store code which is then executed as PHP or served unescaped to site visitors.

Quoted source text, attributed separately from HOL analysis.