CVE-2021-24663: The Simple Schools Staff Directory WordPress plugin through 1.1 does not validate uploaded logo pictures to en

Q: How do I fix CVE-2021-24663?

simple schools staff directory: upgrade to newer than 1.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-24663 being exploited?

CVE-2021-24663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24663 affect?

CVE-2021-24663 affects simple schools staff directory. Severity is high (CVSS 7.2). 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

Q: How urgent is CVE-2021-24663?

Priority 49/100. High severity; Public exploit reference

This month

HIGH 7.2UPGRADE

CVE-2021-24663 is a high-severity flaw (CVSS 7.2) affecting simple schools staff directory. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-09-20
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: simple schools staff directory project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-20 10:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

simple schools staff directory project simple schools staff directory UPGRADE

Affected: <= 1.1

Fixed in: newer than 1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy simple-schools-staff-directory || rpm -q simple-schools-staff-directory || simple-schools-staff-directory --version

2. UPGRADE to newer than 1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade simple-schools-staff-directory

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade simple-schools-staff-directory

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24663?

simple schools staff directory: upgrade to newer than 1.1. Exact commands for each OS are on this page.

Is CVE-2021-24663 being exploited?

CVE-2021-24663 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24663 affect?

CVE-2021-24663 affects simple schools staff directory. Severity is high (CVSS 7.2). 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

How urgent is CVE-2021-24663?

Priority 49/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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