What is CVE-2026-83546?

CVE-2026-83546 is a medium-severity vulnerability in Coolclock, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-09-11.

How severe is CVE-2026-83546?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Coolclock

CVE-2026-83546

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Unknown Coolclock

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-83546?: CVE-2026-83546 is a medium-severity vulnerability in Coolclock, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-09-11.
How severe is CVE-2026-83546?: Medium severity. CVSS v3 base score is 6.8 out of 10.