Is CVE-2023-43655 actively exploited?

CVE-2023-43655 has no public evidence of in-the-wild exploitation as of 2025-04-23.

What is the CVSS score for CVE-2023-43655?

CVE-2023-43655 has a CVSS score of 6.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H.

How do I patch CVE-2023-43655?

Patch guidance is available from getcomposer security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-43655.

CVE-2023-43655 - remediation guidance & executive summary

Q: Which products are affected by CVE-2023-43655?

6 products: getcomposer composer, getcomposer composer, getcomposer composer, debian debian linux, fedoraproject fedora, and 1 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: high
User Action: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-74 CWE-74

Metadata

Primary Vendor: GETCOMPOSER
Published: 9/29/2023
Last Modified: 4/23/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

getcomposer : composergetcomposer : composergetcomposer : composerdebian : debian_linuxfedoraproject : fedorafedoraproject : fedora

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-43655. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-43655

View on NIST NVD

CVE-2023-43655 vulnerability