CVE-2021-24663

Name: CVE-2021-24663
Creator: NVD / NIST
Published: 2021-09-20T10:15:09.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.44%

Last modified Jun 17, 2026

CVE-2021-24663 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. The Simple Schools Staff Directory WordPress plugin through 1.1 does not validate uploaded logo pictures to ensure that are indeed images, allowing high privilege users such as admin to upload arbitrary file like PHP, leading to RCE. EPSS estimates a 1.44% chance of exploitation in the next 30 days.

Description

The Simple Schools Staff Directory WordPress plugin through 1.1 does not validate uploaded logo pictures to ensure that are indeed images, allowing high privilege users such as admin to upload arbitrary file like PHP, leading to RCE

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

1.44%

69.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Simple Schools Staff Directory Project	Simple Schools Staff Directory	<= 1.1

References

https://wpscan.com/vulnerability/8b5b5b57-50c5-4cd8-9171-168c3e9df46aExploit, Third Party Advisory
https://wpscan.com/vulnerability/8b5b5b57-50c5-4cd8-9171-168c3e9df46aExploit, Third Party Advisory

Timeline

Published: Sep 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24663?

How severe is CVE-2021-24663?

CVE-2021-24663 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24663?

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-2021-24663?

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

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Source: NVD / NIST