Ad Inserter <= 2.8.16 - Missing Authorization to Block Visibility Bypass via ai_ajax (CVE-2026-11983) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-11983

Ad Inserter <= 2.8.16 - Missing Authorization to Block Visibility Bypass via ai_ajax

Answer in brief

CVE-2026-11983 records a Medium severity (CVSS 5.3) vulnerability in Ad Inserter <= 2.8.16 - Missing Authorization to Block Visibility Bypass via ai_ajax. The current sources do not mark it as known exploited. The current feed maps spacetime/Ad Inserter – Ad Manager & AdSense Ads (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 Aug 6, 2026Updated Aug 12, 2026Source checked Sep 21, 2026First seen by HOL Aug 6, 2026Material review Aug 12, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. 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 spacetime/Ad Inserter – Ad Manager & AdSense Ads (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
spacetime/Ad Inserter – Ad Manager & AdSense Adsgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for spacetime/Ad Inserter – Ad Manager & AdSense Ads.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 6, 2026

Sources and claim methodology

Upstream source description

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.8.16 due to a missing capability check in the `ai_ajax` function. This makes it possible for unauthenticated attackers to view the contents of ad blocks that an administrator has restricted to administrator-only visibility.

Quoted source text, attributed separately from HOL analysis.