WordPress Photo Gallery by Supsystic plugin <= 1.21.0 - Cross Site Request Forgery (CSRF) vulnerability (CVE-2026-102399) | HOL Guard CVE

Medium · CVSS 5.4CVE-2026-102399

WordPress Photo Gallery by Supsystic plugin <= 1.21.0 - Cross Site Request Forgery (CSRF) vulnerability

Answer in brief

CVE-2026-102399 records a Medium severity (CVSS 5.4) vulnerability in WordPress Photo Gallery by Supsystic plugin <= 1.21.0 - Cross Site Request Forgery (CSRF) vulnerability. The current sources do not mark it as known exploited. The current feed maps supsystic/gallery-by-supsystic (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 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.4
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 5.4. 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 supsystic/gallery-by-supsystic (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
supsystic/gallery-by-supsysticgeneric	>=n/a <=1.21.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for supsystic/gallery-by-supsystic.
Review the reported fix. Source-reported solution: Update the WordPress Photo Gallery - Responsive Image Galleries by Supsystic plugin to the latest available version (at least 1.21.1).

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Source referencepatchstack.com

Upstream source description

Unauthenticated Cross Site Request Forgery (CSRF) in Photo Gallery by Supsystic <= 1.21.0 versions.

Quoted source text, attributed separately from HOL analysis.