VULNERABILITY INTELLIGENCE
CVE-2023-43655
CVSS score6.4 MEDIUM
EPSS probability1.53%
CISA KEVNot currently listed
Published2023-09-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Description
Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has `register_argc_argv` enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.
Weakness classification
- CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Primary references
- security-advisories@github.com — Patch
- security-advisories@github.com — Patch
- security-advisories@github.com — Patch
- security-advisories@github.com — Vendor Advisory
- security-advisories@github.com — Mailing List
- security-advisories@github.com — Mailing List, Third Party Advisory
- security-advisories@github.com — Mailing List, Third Party Advisory
- security-advisories@github.com — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Patch
- af854a3a-2127-422b-91ae-364da2661108 — Patch
- af854a3a-2127-422b-91ae-364da2661108 — Patch
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory