CVE-2024-4577Argument Injection in PHP-CGI
- 9.8CriticalCVSS base score
- 100.0%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 12 Jun 2024
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as PHP-CGI OS Command Injection Vulnerability.
- Added
- 12 Jun 2024
- Fix due (US federal)
- 3 Jul 2024
- Used by ransomware
- Known
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 12 Jun 2024.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module, a Nuclei template and an Exploit-DB entry for it. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits3
Metasploit modules1 module
- PHP CGI Argument Injection Remote Code Execution (Metasploit module) (opens in a new tab)
exploit/windows/http/php_cgi_arg_injection_rce_cve_2024_4577Rank excellentdisclosed 6 Jun 2024
Nuclei templates1 template
- PHP CGI - Argument Injection (Nuclei template) (opens in a new tab)
http/cves/2024/CVE-2024-4577.yamlSeverity critical
Exploit-DB1 entry
- PHP CGI Module 8.3.4 - Remote Code Execution (RCE) (Exploit-DB entry) (opens in a new tab)
EDB-ID 52331webapps, phppublished 15 Jun 2025Not verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By php
- 34 days later
· 34 days later
Published
- 3 days later
· 3 days later
Added to CISA KEV
Known exploited, also by ransomware
- 17 months later
· 17 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| phpCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
References
References23
- https://github.com/php/php-src/security/advisories/GHSA-3qgc-jrrr-25jv (opens in a new tab)x_transferred
- https://blog.orange.tw/2024/06/cve-2024-4577-yet-another-php-rce.html (opens in a new tab)x_transferred
- https://devco.re/blog/2024/06/06/security-alert-cve-2024-4577-php-cgi-argument-injection-vulnerability-en/ (opens in a new tab)x_transferred
- https://arstechnica.com/security/2024/06/php-vulnerability-allows-attackers-to-run-malicious-code-on-windows-servers/ (opens in a new tab)x_transferred
- https://www.imperva.com/blog/imperva-protects-against-critical-php-vulnerability-cve-2024-4577/ (opens in a new tab)x_transferred
- https://github.com/11whoami99/CVE-2024-4577 (opens in a new tab)x_transferred
- https://github.com/xcanwin/CVE-2024-4577-PHP-RCE (opens in a new tab)x_transferred
- https://github.com/rapid7/metasploit-framework/pull/19247 (opens in a new tab)x_transferred
- https://labs.watchtowr.com/no-way-php-strikes-again-cve-2024-4577/ (opens in a new tab)x_transferred
- https://github.com/watchtowrlabs/CVE-2024-4577 (opens in a new tab)x_transferred
- https://www.php.net/ChangeLog-8.php#8.1.29 (opens in a new tab)x_transferred
- https://www.php.net/ChangeLog-8.php#8.2.20 (opens in a new tab)x_transferred
- https://www.php.net/ChangeLog-8.php#8.3.8 (opens in a new tab)x_transferred
- https://cert.be/en/advisory/warning-php-remote-code-execution-patch-immediately (opens in a new tab)x_transferred
- https://isc.sans.edu/diary/30994 (opens in a new tab)x_transferred
- http://www.openwall.com/lists/oss-security/2024/06/07/1 (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/ (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/W45DBOH56NQDRTOM2DN2LNA2FZIMC3PK/ (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20240621-0008/ (opens in a new tab)x_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4577 (opens in a new tab)government-resource
- https://www.vicarius.io/vsociety/posts/php-cgi-os-command-injection-vulnerability-cve-2024-4577 (opens in a new tab)
- https://www.vicarius.io/vsociety/posts/php-cgi-argument-injection-to-rce-cve-2024-4577 (opens in a new tab)
- https://blog.talosintelligence.com/new-persistent-attacks-japan/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-44188 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-4577)Record last updated .