Known vulnerabilities in PHP Compatibility Checker

Make sure your plugins and themes are compatible with newer PHP versions.

1Reported vulnerabilities

4.3Highest CVSS score

1.6.3Latest version

200,000+Active installs

What to do now

Update PHP Compatibility Checker to 1.6.0 or later. 1 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 20, 2026 / Tested up to WordPress: 6.4.10 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2023-24421	Medium 4.3	0.3%	1.5.2 and earlier	`1.6.0`	April 6, 2023

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.