The CoolClock WordPress plugin before 4.3.5 does not escape some shortcode attributes, allowing users with a role as low as Contributor toperform Stored Cross-Site Scripting attacks
CVE-2021-24670 is a medium severity with CVSS 5.4 Stored Cross-Site Scripting issue affecting the Plugin CoolClock – a Javascript Analog Clock. It affects Versions before 4.3.5 and is fixed in 4.3.5.
Use the related hub and response guides to connect this CVE-2021-24670 report with patch validation, scanner checks, and site hardening work.
Open the grouped hub for related CVEs, affected ranges, severity mix, and patch coverage.
Check access, XML-RPC exposure, backup readiness, and monitoring after patching.
Use containment, evidence capture, remediation, and validation steps when exploit risk is high.
CVE-2021-24670 is tracked for the Plugin CoolClock – a Javascript Analog Clock as medium severity with CVSS 5.4. The affected range is Versions before 4.3.5. Update CoolClock – a Javascript Analog Clock to 4.3.5 or newer where that version is compatible with the site.
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Affected version data gives operators a concrete comparison point against installed WordPress software.
A fixed version is present, so the page can answer update and remediation intent directly.
External references are available for source validation, advisory review, and incident notes.
Use these checks when converting this record into a patch ticket, incident note, or risk acceptance decision.
Inventory the installed Plugin package and compare its version with Versions before 4.3.5.
Confirm CoolClock – a Javascript Analog Clock is updated to 4.3.5 or newer.
Review references and CVSS vector details for exploitability, authentication requirements, and exposure path.
After patching, re-run vulnerability monitoring and keep the related plugin or theme hub under review for follow-up CVEs.
| Software Type | Plugin |
|---|---|
| Software Slug |
coolclock
View on wordpress.org
|
| CVE | CVE-2021-24670 |
| Patched Versions |
4.3.5
|
| Affected Versions |
Versions before 4.3.5
|
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