CVE-2019-18886: Medium severity symfony vulnerability

Q: What is CVE-2019-18886?

CVE-2019-18886 is a vulnerability that allows user enumeration using the switch user functionality in Symfony versions 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7.

Q: What is the severity of CVE-2019-18886?

The severity of CVE-2019-18886 is medium with a CVSS score of 5.3.

Q: How does CVE-2019-18886 affect Symfony?

CVE-2019-18886 affects Symfony versions 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7.

Q: How can I fix CVE-2019-18886?

To fix CVE-2019-18886, update your Symfony installation to version 4.2.12 or 4.3.8 or later.

Q: Where can I find more information about CVE-2019-18886?

You can find more information about CVE-2019-18886 on the Symfony website.

Published Nov 13, 2019

Updated

An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7. The ability to enumerate users was possible due to different handling depending on whether the user existed when making unauthorized attempts to use the switch users functionality. This is related to symfony/security.

Other sources

CVE-2019-18886: Prevent user enumeration using switch user functionality

Affected Software

4 affected components

composer/symfony/security-http>=4.1.0, <4.2.0, >=4.2.0, <4.2.12, >=4.3.0, <4.3.8

composer/symfony/symfony>=4.1.0, <4.2.0, >=4.2.0, <4.2.12, >=4.3.0, <4.3.8

SensioLabs Symfony>=4.2.0<=4.2.11

SensioLabs Symfony>=4.3.0<=4.3.7

Event History

Nov 13, 2019

Advisory Published

08:00 AM

Nov 21, 2019

CVE Published

via MITRE·05:41 PM

Data Sourced

via MITRE·05:41 PM

Description

Frequently Asked Questions

What is CVE-2019-18886?

CVE-2019-18886 is a vulnerability that allows user enumeration using the switch user functionality in Symfony versions 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7.

What is the severity of CVE-2019-18886?