How severe is CVE-2021-24663?

CVE-2021-24663 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24663?

CVE-2021-24663 affects Simple Schools Staff Directory Project Simple Schools Staff Directory. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-24663 published?

CVE-2021-24663 was published on 2021-09-20 and last updated on 2026-06-17.

CVE-2021-24663

CVE-2021-24663 is a high-severity vulnerability in Simple Schools Staff Directory Project Simple Schools Staff Directory with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Simple Schools Staff Directory Project Simple Schools Staff Directory
Published: 2021-09-20
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2021-24663?: 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 severe is CVE-2021-24663?: CVE-2021-24663 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24663?: CVE-2021-24663 affects Simple Schools Staff Directory Project Simple Schools Staff Directory. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-24663 published?: CVE-2021-24663 was published on 2021-09-20 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/8b5b5b57-50c5-4cd8-9171-168c3e9df46a

Affected products (1)

cpe:2.3:a:simple_schools_staff_directory_project:simple_schools_staff_directory:*:*:*:*:*:wordpress:*:*

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