Vulnerability · Published Sep 11, 2026 · Assigned by WPScan

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

Medium 6.8

In plain English

A medium-severity cross-site scripting in CoolClock from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)0.4%top 62.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	CoolClock	0 – before 4.3.8

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/57fcdde1-1723-42e1-a6d0-16e63a532ac7/ exploit, vdb-entry, technical-description