CVE-2021-24925: Modern Events Calendar Lite < 6.1.5 - Reflected Cross-Site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-13 · updated 2026-06-17
Weakness: CWE-79

Description

The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the current_month_divider parameter of its mec_list_load_more AJAX call (available to both unauthenticated and authenticated users) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue

Affected products

Modern Events Calendar Lite: before 6.1.5 — fixed in 6.1.5

How to fix

Upgrade to a fixed version: Modern Events Calendar Lite 6.1.5. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/82233588-6033-462d-b886-a8ef5ee9adb0
https://wpscan.com/vulnerability/82233588-6033-462d-b886-a8ef5ee9adb0

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