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  4. CVE 2026 83546 coolclock 438 contributor stored xss via skin
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Back to active CVEs
Medium · CVSS 6.8CVE-2026-83546

CoolClock < 4.3.8 - Contributor+ Stored XSS via Skin Class AttributeCVE-2026-83546

Answer in brief

CVE-2026-83546 records a Medium severity (CVSS 6.8) vulnerability in CoolClock < 4.3.8 - Contributor+ Stored XSS via Skin Class Attribute. The current sources do not mark it as known exploited. The current feed maps Unknown/CoolClock (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 11, 2026Updated Sep 11, 2026Source checked Oct 26, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.8. 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/CoolClock (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/CoolClockgeneric>=0 <4.3.84.3.8

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/CoolClock.
  2. 2Review the reported fix. Update Unknown/CoolClock to 4.3.8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 11, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source description

The CoolClock WordPress plugin before 4.3.8 does not properly escape a skin setting before outputting it within an HTML attribute, allowing users with contributor-level access and above to inject arbitrary web scripts that execute when the content is viewed.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Reflected cross-site scripting in the video library of the Regional Parliament of Castile-La ManchaAlso CWE-79
  • WordPress Royal Elementor Addons plugin <= 1.7.1069 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress JetElements For Elementor plugin <= 2.9.2.5 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Ad Inserter plugin <= 2.8.18 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Gutenberg Blocks by Kadence Blocks plugin <= 3.8.0.1 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Image Gallery block – Create and display photo gallery/photo album. plugin <= 2.4.1 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 26, 2026
References
1 linked source
Open source record