HomeWordPress vulnerabilitiesCoolClock
CoolClock vulnerabilities
CoolClock has 3 known vulnerabilities in this database. The most recent published record is dated 11 Sep 2026.
- Known vulnerabilities
- 3
- Active installs
- 1,000+
- Latest version
- 4.3.9
- Last updated
- 14 Sep 2026
- Most recent
- 11 Sep 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2026-83546 | Medium 6.8 | Before 4.3.8 | Fixed in 4.3.8 | 11 Sep 2026 |
| Cross-site scripting (XSS) CVE-2026-83545 | Medium 6.8 | Before 4.3.8 | Fixed in 4.3.8 | 11 Sep 2026 |
| Cross-site scripting (XSS) CVE-2021-24670 | Medium 5.4 | Before 4.3.5 | Fixed in 4.3.5 | 27 Sep 2021 |
Read the published descriptions
- CVE-2026-83546, 11 Sep 2026
- The CoolClock WordPress plugin before 4.3.8 does not properly escape a skin setting before outputting it within an HTML attribute, allowing users with contributor-level access and above to inject arbitrary web scripts that execute when the content is viewed. CVE record
- CVE-2026-83545, 11 Sep 2026
- 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. CVE record
- CVE-2021-24670, 27 Sep 2021
- 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 record
What to do if you run CoolClock
If you run CoolClock, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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