CVE-2026-83545

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

MEDIUM

6.8

CVSS Score

Published: September 11, 2026 at 06:00 AM UTC

Updated: September 11, 2026 at 05:50 PM UTC

1 product affected across 1 vendorCoolClock

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Severity

MEDIUM6.8

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CoolClock · Coolclock Projectwordpress-plugin

60%

v < 4.3.8

Affected range stops below 4.3.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description

Source: cverecord

https://wpscan.com/vulnerability/d331d834-08f7-46e2-859a-7b797213ad0b/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: HIGH
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-79

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