CVE-2023-43655 (GCVE-0-2023-43655)
Vulnerability from cvelistv5 – Published: 2023-09-29 19:33 – Updated: 2025-06-18 13:59
VLAI
EPSS
VEX
Title
Remote Code Execution via web-accessible composer.phar
Summary
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.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
8 references
Impacted products
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"redhat_vex": {
"current_release_date": "2026-01-13T22:55:15+00:00",
"cve": "CVE-2023-43655",
"id": "CVE-2023-43655",
"initial_release_date": "2023-09-29T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "composer: Remote Code Execution via web-accessible composer.phar",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-43655.json",
"version": "3"
},
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"aggregate_severity": "moderate",
"current_release_date": "2026-05-19T02:03:22Z",
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"initial_release_date": "2023-10-03T02:01:31Z",
"product_status:recommended": "25",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-43655",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-43655.json",
"version": "17"
},
"vulnrichment": {
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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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