CVE-2026-83545 - CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON

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MEDIUM

CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON

Published Sep 11, 2026

6.8

MEDIUM

CVSS 3.1

EPSS 0.43%

Description

The CoolClock WordPress plugin before 4.3.8 does not properly escape a custom skin setting before outputting it inside an inline script, allowing users with contributor-level access and above to inject arbitrary JavaScript that executes when the content is viewed.

Affected products

Vendor n/a Product CoolClock Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <4.3.8

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

CoolClock

unaffected

Version	Status	Constraints
0	affected	<4.3.8

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75956
Advisory
https://wpscan.com/vulnerability/d331d834-08f7-46e2-859a-7b797213ad0b/
exploitvdb-entrytechnical-description

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75956		Advisory
https://wpscan.com/vulnerability/d331d834-08f7-46e2-859a-7b797213ad0b/		exploitvdb-entrytechnical-description