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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2021-29472

Composer is a dependency manager for PHP. URLs for Mercurial repositories in the root composer.json and package source download URLs are not sanitized correctly. Specifically crafted URL values allow code to be executed in the HgDriver if hg/Mercurial is installed on the system. The impact to Composer users directly is limited as the composer.json file is typically under their own control and source download URLs can only be supplied by third party Composer repositories they explicitly trust to download and execute source code from, e.g. Composer plugins. The main impact is to services passing user input to Composer, including Packagist.org and Private Packagist. This allowed users to trigger remote code execution. The vulnerability has been patched on Packagist.org and Private Packagist within 12h of receiving the initial vulnerability report and based on a review of logs, to the best of our knowledge, was not abused by anyone. Other services/tools using VcsRepository/VcsDriver or derivatives may also be vulnerable and should upgrade their composer/composer dependency immediately. Versions 1.10.22 and 2.0.13 include patches for this issue.

CVSS 8.8 · HighBuzz score 20.4

Buzz score

Why this CVE is surfacing

Buzz score total 20.4

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
13.9
3 evidence mentions in the snapshot
Diversity score
6.5
2 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
3 source links · newest first
  • A flaw in the Packagist PHP repository could have allowed supply chain attacksSecurity Affairs

    Experts disclosed a flaw in the PHP software package repository Packagist that could have been exploited to carry out supply chain attacks. SonarSource Researchers disclosed details about a now-fixed vulnerability (CVE-2022-24828) in PHP software package repository Packagist,, that could have been exploited to carry out supply chain attacks. The issue was addressed within hours by […]

    newssecurityaffairs.comOct 4, 2022, 8:19 PM
  • Critical Packagist Vulnerability Opened Door for PHP Supply Chain AttackSecurityWeek

    Code security company SonarSource today published details on a severe vulnerability impacting Packagist, which could have been abused to mount supply chain attacks targeting the PHP community.

    newswww.securityweek.comOct 4, 2022, 3:14 PM
  • Command injection flaw in PHP Composer allowed supply-chain attacksSecurity Affairs

    A vulnerability in the PHP Composer could have allowed an attacker to execute arbitrary commands and backdoor every PHP package. The maintainers of the PHP Composer package have addressed a critical vulnerability, tracked as CVE-2021-29472, that could have allowed an attacker to execute arbitrary commands and establish a backdoor in every PHP package. Composer is the major […]

    newssecurityaffairs.comApr 29, 2021, 9:28 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

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