What’s Vulnerable › Vulnerabilities

CVE-2021-24670: CoolClock < 4.3.5 - Contributor+ Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-27 · updated 2026-06-17
• Weakness: CWE-79

Description

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

Affected products

• CoolClock – a Javascript Analog Clock: before 4.3.5 — fixed in 4.3.5

How to fix

Upgrade to a fixed version: CoolClock – a Javascript Analog Clock 4.3.5. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/a092548f-1ad5-44d3-9901-cdf4ebcee40a
• https://wpscan.com/vulnerability/a092548f-1ad5-44d3-9901-cdf4ebcee40a

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