Is CVE-2023-43655 in the CISA KEV catalog?

No. CVE-2023-43655 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-43655?

CVE-2023-43655 has a CVSS v3 base score of 6.4 (MEDIUM).

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

CVE-2023-43655 has an EPSS score of 1.38% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-43655?

Upgrade composer on debian 12 to 2.5.5-1+deb12u4 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2023-43655

MEDIUM

6.4

CVSS v3

NVD

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.

CWE-74Injection

How to fix

Remediation Available

composerDebian

Fixed in:2.5.5-1+deb12u4CVE-2023-43655

Fixed in:2.6.4-1CVE-2023-43655

composerUbuntu

Fixed in:1.0.0~beta2-1ubuntu0.1~esm2USN-7603-1

Fixed in:1.6.3-1ubuntu0.1~esm2USN-7603-1

Fixed in:1.10.1-1ubuntu0.1~esm2USN-7603-1

Fixed in:2.2.6-2ubuntu4+esm1USN-7603-1

Fixed in:2.7.1-2ubuntu0.1~esm1USN-7603-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

1.38%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Patch3

Vendor Advisory1

github.com

Third-Party Advisory3

Mailing List1

lists.debian.org

Related Vulnerabilities

Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2013-2251	Critical	9.8	100%	KEV	Fix
CVE-2023-22527	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-2725	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2022-35914	Critical	9.8	100%	KEV	-
CVE-2019-17558	High	7.5	99%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-23.