CVE-2019-11043
Underflow in PHP-FPM can lead to RCE
- Published
- Oct 28, 2019
- Updated
- Oct 21, 2025
- Assigning CNA
- php
- Evidence observed
- Oct 28, 2019
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.
Sources
- Vulhub vulnerability labs
Declared conditions
- lab image version: nginx:1(php/CVE-2019-11043/docker-compose.yml:services.nginx.image)
- lab image version: vulhub/php:7.2.10-fpm(php/CVE-2019-11043/docker-compose.yml:services.php.image)
http/cves/2019/CVE-2019-11043.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: dsl,regex,status,word($.matchers[*].type)
- PHP-FPM Underflow RCEModule
modules/exploits/multi/http/php_fpm_rce.rb
Metasploit Framework modulesDeclared conditions
- platform: PHP,Unix($.exploit_multi/http/php_fpm_rce.platform)
- verification: check_declared($.exploit_multi/http/php_fpm_rce.check)
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.