Critical · CVSS 9.2CVE-2016-20101

Issuu Panel WordPress Plugin < 1.6.6 File Inclusion via ajax-docs.phpCVE-2016-20101

Answer in brief

CVE-2016-20101 records a Critical severity (CVSS 9.2) vulnerability in Issuu Panel WordPress Plugin < 1.6.6 File Inclusion via ajax-docs.php. The current sources do not mark it as known exploited. The current feed maps Pedro Marcelo/Issuu Panel (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 Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.2. 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 Pedro Marcelo/Issuu Panel (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Pedro Marcelo/Issuu Panelgeneric	>=1.0 <1.6.6	1.6.6

Recommended response

Check inventory. Check lockfiles and deployed manifests for Pedro Marcelo/Issuu Panel.
Review the reported fix. Update Pedro Marcelo/Issuu Panel to 1.6.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 20, 2026

Sources and claim methodology

Upstream source description

Issuu Panel plugin for WordPress before 1.6.6 contains a PHP file inclusion vulnerability that allows unauthenticated attackers to include remote or local files through the 'abspath' parameter. Attackers can send GET requests to menu/documento/requests/ajax-docs.php with a crafted abspath value passed to require() to execute remote PHP code or include local files. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-20.

Quoted source text, attributed separately from HOL analysis.