CVE-2019-18886

moderate-risk
Published 2019-11-21

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.

Do I need to act?

~
1.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Sensiolabs

References (6)

Release Notes https://github.com/symfony/symfony/releases/tag/v4.3.8
Vendor Advisory https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-us...
Release Notes https://symfony.com/blog/symfony-4-3-8-released
Release Notes https://github.com/symfony/symfony/releases/tag/v4.3.8
Vendor Advisory https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-us...
Release Notes https://symfony.com/blog/symfony-4-3-8-released
30
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 4/34 · Minimal
Exposure 5/34 · Minimal