What’s Vulnerable › Vulnerabilities

CVE-2021-24687: Modern Events Calendar Lite < 5.22.2 - Admin+ Stored Cross-Site Scripting

• Severity: medium (CVSS 4.8 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: 2021-10-04 · updated 2026-06-17
• Weakness: CWE-79

Description

The Modern Events Calendar Lite WordPress plugin before 5.22.2 does not escape some of its settings before outputting them in attributes, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Affected products

• Modern Events Calendar Lite: before 5.22.2 — fixed in 5.22.2

How to fix

Upgrade to a fixed version: Modern Events Calendar Lite 5.22.2. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/300ba418-63ed-4c03-9031-263742ed522e
• https://wpscan.com/vulnerability/300ba418-63ed-4c03-9031-263742ed522e

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