CVE-2019-18888

HIGH

Symfony <4.3.8 - Command Injection

Title source: llm

Description

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command. This is related to symfony/http-foundation (and symfony/mime in 4.3.x).

References (6)

[Release Notes] https://github.com/symfony/symfony/releases/tag/v4.3.8

[Vendor Advisory] https://symfony.com/blog/cve-2019-18888-prevent-argument-injection-in-a-mimetypeguesser

[Release Notes] https://symfony.com/blog/symfony-4-3-8-released

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ/

Scores

CVSS v3 7.5

EPSS 0.0274

EPSS Percentile 85.8%

Attack Vector NETWORK

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

Classification

CWE

CWE-88

Status published

Affected Products (6)

sensiolabs/symfony < 2.8.50

fedoraproject/fedora

fedoraproject/fedora

symfony/http-foundation < 2.8.52Packagist

symfony/mime < 4.3.8Packagist

symfony/symfony < 2.8.52Packagist

Timeline

Published Nov 21, 2019

Tracked Since Feb 18, 2026