CVE-2026-83545: CWE-79 Cross-Site Scripting (XSS) in CoolClock
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.
AI Analysis
Technical Summary
The CoolClock WordPress plugin prior to version 4.3.8 contains a CWE-79 Cross-Site Scripting vulnerability. The issue is due to improper escaping of a custom skin setting before outputting it inside an inline script block. This allows authenticated users with contributor-level permissions or above to inject malicious JavaScript code that executes in the context of users viewing the affected content.
Potential Impact
An attacker with contributor-level access or higher can exploit this vulnerability to execute arbitrary JavaScript in the browsers of users who view the affected content. This could lead to session hijacking, defacement, or other client-side attacks depending on the injected payload and user context.
Mitigation Recommendations
Upgrade the CoolClock plugin to version 4.3.8 or later, where this vulnerability has been fixed. Since no patch links are provided, verify the availability of the update from the official plugin repository or vendor advisory before upgrading. Do not rely on generic mitigations as the vulnerability is specific to improper escaping in the plugin code.
CVE-2026-83545: CWE-79 Cross-Site Scripting (XSS) in CoolClock
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.
CVSS v3.1
Score 6.8medium
Affected software
CoolClock
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The CoolClock WordPress plugin prior to version 4.3.8 contains a CWE-79 Cross-Site Scripting vulnerability. The issue is due to improper escaping of a custom skin setting before outputting it inside an inline script block. This allows authenticated users with contributor-level permissions or above to inject malicious JavaScript code that executes in the context of users viewing the affected content.
Potential Impact
An attacker with contributor-level access or higher can exploit this vulnerability to execute arbitrary JavaScript in the browsers of users who view the affected content. This could lead to session hijacking, defacement, or other client-side attacks depending on the injected payload and user context.
Mitigation Recommendations
Upgrade the CoolClock plugin to version 4.3.8 or later, where this vulnerability has been fixed. Since no patch links are provided, verify the availability of the update from the official plugin repository or vendor advisory before upgrading. Do not rely on generic mitigations as the vulnerability is specific to improper escaping in the plugin code.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-31T18:05:49.023Z
- State
- PUBLISHED
Threat ID: 6aa3a07b91cc7f3848c78c4a
Added to database: 09/11/2026, 06:32:27 UTC
Last enriched: 09/11/2026, 06:48:33 UTC
Last updated: 09/11/2026, 22:06:35 UTC
Views: 14
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