Medium severity · published Nov 21, 2019
CVE-2019-18886
An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7
5.3
CVSS
1.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
Symfony · Sensiolabs
4.2.0 through 4.2.11; 4.3.0 through 4.3.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18886
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18886
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-user-functionality
Release Notes
https://symfony.com/blog/symfony-4-3-8-released
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