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Vulnerability record · CVE-2021-24925 · published 13 December 2021

CVE-2021-24925: Webnus modern events calendar lite cross-site scripting vulnerability

Webnus · Modern Events Calendar Lite

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

6.1 CVSS 3.1 Medium EPSS 0.80% · top 45.3% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/82233588-6033-462d-b886-a8ef5ee9adb0 ExploitThird Party Advisory
https://wpscan.com/vulnerability/82233588-6033-462d-b886-a8ef5ee9adb0 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-4458Webnus modern events calendar lite sql injection vulnerabilityThe Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX…EPSS 0.35%9.8CVE-2021-24946Modern Events Calendar Lite unauthenticated SQL injectionThe Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise or escape the time parameter before using it in a SQL statement withi…EPSS 73%analysed9.6CVE-2024-6522Webnus modern events calendar server-side request forgery (ssrf) vulnerabilityThe Modern Events Calendar plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 7.12.1 via the 'me…EPSS 0.40%8.8CVE-2024-5441Webnus modern events calendar unrestricted file upload vulnerabilityThe Modern Events Calendar plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the set_featured_image…EPSS 1.1%8.8CVE-2021-24149Webnus modern events calendar lite sql injection vulnerabilityUnvalidated input in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.6, did not sanitise the mec[post_id] POST parameter in th…EPSS 1.5%7.5CVE-2021-24146Webnus modern events calendar lite improper access control vulnerabilityLack of authorisation checks in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not properly restrict access to the exp…EPSS 31%7.2CVE-2021-24145Modern Events Calendar Lite plugin arbitrary file upload via CSV importThe Modern Events Calendar Lite WordPress plugin before 5.16.5 failed to properly validate files during import, so a PHP file could be uploaded by se…EPSS 87%analysed5.4CVE-2022-30533Webnus modern events calendar lite cross-site scripting vulnerabilityCross-site scripting vulnerability in Modern Events Calendar Lite versions prior to 6.3.0 allows remote an authenticated attacker to inject an arbitr…EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2021-24925), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.