Slick Slider < 0.5.3 - Contributor+ Stored XSS via Gallery Shortcode (CVE-2026-16537) | HOL Guard CVE

Medium · CVSS 5.4CVE-2026-16537

Slick Slider < 0.5.3 - Contributor+ Stored XSS via Gallery Shortcode

Answer in brief

CVE-2026-16537 records a Medium severity (CVSS 5.4) vulnerability in Slick Slider < 0.5.3 - Contributor+ Stored XSS via Gallery Shortcode. The current sources do not mark it as known exploited. The current feed maps Unknown/Slick Slider (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 26, 2026Source checked Sep 20, 2026First seen by HOL Aug 6, 2026Material review Aug 26, 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: Available

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 Unknown/Slick Slider (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Slick Slidergeneric	>=0 <0.5.3	0.5.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Slick Slider.
Review the reported fix. Update Unknown/Slick Slider to 0.5.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 6, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The Slick Slider WordPress plugin before 0.5.3 does not sanitize and escape a shortcode attribute value before outputting it in an HTML attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks that execute when a user views the affected post.

Quoted source text, attributed separately from HOL analysis.