EUVD-2026-75956
GHSA-rp7h-v4qm-gcfw
Severity by source
AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Contributor is PR:L not PR:H; stored XSS executing in admin's browser is a scope change (S:C); no availability impact demonstrated by pure XSS.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
Stored cross-site scripting in the CoolClock WordPress plugin (before 4.3.8) allows contributor-level users to inject arbitrary JavaScript through an unsanitized custom skin setting that is echoed verbatim into an inline script block. When a higher-privileged user such as an administrator views the affected post or page, the payload executes in their browser, enabling session hijacking or full site takeover. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated WordPress account with at minimum contributor-level privileges - sufficient to create or edit posts containing CoolClock widget blocks or shortcodes and set a custom skin value. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 6.8 uses vector AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H, but the PR:H designation conflicts with the description: contributor is a low-privilege WordPress role (PR:L), not a high-privilege one. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade CoolClock to version 4.3.8 or later via the WordPress plugin repository; this is the vendor-released patch that resolves the unsafe output escaping. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Stored cross-site scripting in the CoolClock WordPress plugin before 4.3.8 allows contributor-level and higher authentic
The CoolClock WordPress plugin before 4.3.5 does not escape some shortcode attributes, allowing users with a role as low
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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