What is CVE-2021-4458?

CVE-2021-4458 is a medium-severity vulnerability in Webnus Modern_events_calendar_lite, classified under SQL Injection. CVSS score: 5.9/10. Published 2025-07-12.

How severe is CVE-2021-4458?

Medium severity. CVSS v3 base score is 5.9 out of 10.

SQL Injection in Webnus Modern_events_calendar_lite

CVE-2021-4458

The 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 action in all versions up to, and including, 6.3.0 due to insufficient escaping on the us…

Vulnerability class: SQL Injection

EPSS: 0.004 (27.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Webnus Modern_events_calendar_lite
Webnus/ Modern Events Calendar Lite — versions 0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

security@wordfence.com (Third Party Advisory)
security@wordfence.com (Patch)

Frequently asked questions

What is CVE-2021-4458?: CVE-2021-4458 is a medium-severity vulnerability in Webnus Modern_events_calendar_lite, classified under SQL Injection. CVSS score: 5.9/10. Published 2025-07-12.
How severe is CVE-2021-4458?: Medium severity. CVSS v3 base score is 5.9 out of 10.