What is CVE-2023-24421?

CVE-2023-24421 is a medium-severity vulnerability in Wp Engine PHP Compatibility Checker, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2023-07-11.

How severe is CVE-2023-24421?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-24421 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CSRF in Wp Engine PHP Compatibility Checker

CVE-2023-24421

Cross-Site Request Forgery (CSRF) vulnerability in WP Engine PHP Compatibility Checker plugin <= 1.5.2 versions.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2023-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (17.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/php-compatibility-checker/wordpress-php-c… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2023-24421?: CVE-2023-24421 is a medium-severity vulnerability in Wp Engine PHP Compatibility Checker, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2023-07-11.
How severe is CVE-2023-24421?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-24421 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.