CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- PHP-CGI OS Command Injection Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
In PHP versions 8.1.* before 8.1.29, 8.2.* before 8.2.20, 8.3.* before 8.3.8, when using Apache and PHP-CGI on Windows, if the system is set up to use certain code pages, Windows may use "Best-Fit" behavior to replace characters in command line given to Win32 API functions. PHP CGI module may misinterpret those characters as PHP options, which may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.
Affected products
php: php; microsoft: windows; fedoraproject: fedora
References10
- github.com/rapid7/metasploit-framework/pull/19247 ExploitIssue TrackingPatch
- github.com/rapid7/metasploit-framework/pull/19247 ExploitIssue TrackingPatch
- arstechnica.com/security/2024/06/php-vulnerability-allows-attac… ExploitPress/Media CoverageThird Party Advisory
- devco.re/blog/2024/06/06/security-alert-cve-2024-4577-php-cgi-a… ExploitThird Party Advisory
- github.com/11whoami99/CVE-2024-4577 Exploit
- github.com/php/php-src/security/advisories/GHSA-3qgc-jrrr-25jv ExploitThird Party Advisory
- github.com/watchtowrlabs/CVE-2024-4577 ExploitThird Party Advisory
- github.com/xcanwin/CVE-2024-4577-PHP-RCE ExploitThird Party Advisory
- isc.sans.edu/diary/30994 ExploitThird Party Advisory
- labs.watchtowr.com/no-way-php-strikes-again-cve-2024-4577/ ExploitThird Party Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 100% percentile: 100 · as of 3 November 2026
- CWE
- CWE-78
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