Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-4vpc-5jx4-cfqg
Advisory ID github_osv/GHSA-4vpc-5jx4-cfqg
Aliases CVE-2019-18886
Summary User enumeration leak using switch user functionality in Symfony 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.
Status Published
Exploitability 0.5
Weighted Severity 4.8
Risk 2.4
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (2)
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-203 Observable Discrepancy
System Score Found at
cvssv3.1 5.3 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/12/GHSA-4vpc-5jx4-cfqg/GHSA-4vpc-5jx4-cfqg.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2019-18886.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18886.yaml
https://github.com/symfony/symfony/releases/tag/v4.3.8
https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality
https://symfony.com/blog/symfony-4-3-8-released
CVE-2019-18886 https://nvd.nist.gov/vuln/detail/CVE-2019-18886
CVE-2019-18886 https://symfony.com/cve-2019-18886
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/12/GHSA-4vpc-5jx4-cfqg/GHSA-4vpc-5jx4-cfqg.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.