Vulnerability · Published Sep 11, 2026 · Assigned by WPScan
CVE-2026-83545CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON
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 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 (as reported)
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/d331d834-08f7-46e2-859a-7b797213ad0b/ exploit, vdb-entry, technical-description