CVE-2021-24552

Name: CVE-2021-24552
Creator: NVD / NIST
Published: 2021-08-23T12:15:09.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.58%

Last modified Jun 17, 2026

CVE-2021-24552 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. The Simple Events Calendar WordPress plugin through 1.4.0 does not sanitise, validate or escape the event_id POST parameter before using it in a SQL statement when deleting events, leading to an authenticated SQL injection issue. EPSS estimates a 1.58% chance of exploitation in the next 30 days.

Description

The Simple Events Calendar WordPress plugin through 1.4.0 does not sanitise, validate or escape the event_id POST parameter before using it in a SQL statement when deleting events, leading to an authenticated SQL injection issue

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

1.58%

72.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Simple Events Calendar Project	Simple Events Calendar	<= 1.4.0

References

https://codevigilant.com/disclosure/2021/wp-plugin-simple-events-calendar/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/3482a015-a5ed-4913-b516-9eae2b3f89dbExploit, Third Party Advisory
https://codevigilant.com/disclosure/2021/wp-plugin-simple-events-calendar/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/3482a015-a5ed-4913-b516-9eae2b3f89dbExploit, Third Party Advisory

Timeline

Published: Aug 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24552?

How severe is CVE-2021-24552?

CVE-2021-24552 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24552?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24552?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST