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Fencer Intel
high 8.2

CVE-2021-41116 json

Command injection in composer on Windows

published 5y ago modified 2mo ago also BIT-composer-2021-41116 , EUVD-2021-2198 , GHSA-frqg-7g38-6gcf

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

Composer is an open source dependency manager for the PHP language. In affected versions windows users running Composer to install untrusted dependencies are subject to command injection and should upgrade their composer version. Other OSs and WSL are not affected. The issue has been resolved in composer versions 1.10.23 and 2.1.9. There are no workarounds for this issue.

Patch / fix

  • packagist composer/composer 1.10.23, 2.1.9
  • bitnami composer 1.10.23, 2.1.9
  • getcomposer composer 1.10.23, 2.1.9
  • tenable tenable.sc 5.21.0
  • php-composer2 openSUSE Tumbleweed 2.1.12-1.1
  • php-composer openSUSE Tumbleweed 1.10.25-1.1
  • php-composer Package Hub 15 SP3, openSUSE Leap 15.3 1.10.26-bp153.2.6.1

opensuse advisories openSUSE-SU-2024:11617-1openSUSE-SU-2024:11874-1openSUSE-SU-2022:0132-1

  • composer Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 2.1.9-r0

alpine advisories ALPINE-CVE-2021-41116

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2021-41116 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

2.83% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
GitHub 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist composer/composer
<1.10.23
>=2.0.0-alpha1, <2.1.9
1.10.23
2.1.9
bitnami composer
<1.10.23
>=2.0.0, <2.1.9
1.10.23
2.1.9

Affected products

  • composer composer

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.