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CVE-2026-83545— CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON

Quick assessment

Affected
Unknown CoolClock
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CoolClock WordPress 插件在 4.3.8 版本之前，未对自定义皮肤设置进行适当转义，导致该设置在输出到内联脚本中时存在风险。这使得具有“贡献者”或更高权限的用户可以注入任意 JavaScript 代码，该代码将在内容被查看时执行。

AI Predicted 6.4 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions
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I. Basic Information for CVE-2026-83545

Vulnerability Information
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Vulnerability Title
CoolClock < 4.3.8 - Contributor+ Stored XSS via Custom Skin JSON
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown CoolClock 0 ~ 4.3.8 -

II. Public POCs for CVE-2026-83545

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III. Intelligence Information for CVE-2026-83545

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Vendor Advisories for CVE-2026-83545 (1)

Same Patch Batch · Unknown · 2026-09-11 · 19 CVEs total

CVE-2026-74925 MultiVendorX 5.0.0 - 5.0.15 - Store Owner+ Privilege Escalation to Administrator
CVE-2025-15695 GTranslate < 3.0.10 - Admin+ Stored XSS
CVE-2026-14559 Teddy Bear Customize Addon <= 1.0.5 - Unauthenticated Account Takeover
CVE-2026-83546 CoolClock < 4.3.8 - Contributor+ Stored XSS via Skin Class Attribute
CVE-2026-14566 Advanced Customized Prompts <= 1.0.1 - Subscriber+ WooCommerce Order Item Metadata Tamperi
CVE-2026-14560 Teddy Bear Customize Addon <= 1.0.5 - Unauthenticated Arbitrary File Upload
CVE-2026-14565 Advanced Customized Prompts <= 1.0.1 - Subscriber+ Stored XSS via Product Popup Configurat
CVE-2026-14563 Advanced Customized Prompts <= 1.0.1 - Unauthenticated Account Takeover
CVE-2026-14562 Teddy Bear Customize Addon <= 1.0.5 - Unauthenticated Order Data Disclosure
CVE-2026-86815 BackWPup 5.2.2 - 5.7.4 - BackWPup Jobs Checker+ Database Backup Exfiltration via Missing A
CVE-2026-85677 Gutenverse News < 3.3.3 - Unauthenticated Stored XSS via Comment Content
CVE-2026-85678 AI Builder 2.4.1 - 2.7.7 - Contributor+ Stored XSS via Post JavaScript
CVE-2026-82305 YITH WooCommerce Wishlist < 4.18.1 - Unauthenticated Arbitrary Wishlist Rename via change_
CVE-2026-86781 SSL Zen < 4.7.40 - Subscriber+ TLS Private Key Disclosure
CVE-2026-86780 Featured Image with URL < 1.0.6 - Contributor+ Stored XSS via Image Alt Text
CVE-2026-86779 Visualizer < 4.0.6 - Contributor+ Arbitrary Chart Deletion via deleteChart
CVE-2026-86782 Visualizer < 4.0.6 - Contributor+ Arbitrary Post/Page Modification via IDOR
CVE-2026-86812 WPCafe 3.0.10 - 3.0.17 - Unauthenticated Order Disclosure and Modification via food-orders

IV. Related Vulnerabilities

Same product: CoolClock
Same vendor: Unknown

V. Comments for CVE-2026-83545

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