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CVE-2019-18886

Date: November 21, 2019

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.

Language: PHP

Severity Score

Related Resources (9)

https://symfony.com/cve-2019-18886
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2019-18886.yaml
https://symfony.com/blog/symfony-4-3-8-released
https://github.com/symfony/symfony/releases/tag/v4.3.8
https://nvd.nist.gov/vuln/detail/CVE-2019-18886
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18886.yaml
https://security-tracker.debian.org/tracker/CVE-2019-18886
https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality
https://www.mend.io/vulnerability-database/CVE-2019-18886

Severity Score

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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