CVE-2026-83545

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

Published Sep 11, 2026 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-79
Type Values Removed Values Added
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.
Title CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON
References

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Sep 11, 2026, 10:12 AM
Reserved
Aug 31, 2026, 6:05 PM
Status
Deferred
Published
Sep 11, 2026, 7:16 AM
Modified
Sep 11, 2026, 5:35 PM