Medium severity5.3NVD Advisory· Published Nov 21, 2019· Updated Jun 17, 2026
CVE-2019-18886
CVE-2019-18886
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/security-httpPackagist | >= 4.1.0, < 4.2.12 | 4.2.12 |
symfony/security-httpPackagist | >= 4.3.0, < 4.3.8 | 4.3.8 |
symfony/symfonyPackagist | >= 4.1.0, < 4.2.12 | 4.2.12 |
symfony/symfonyPackagist | >= 4.3.0, < 4.3.8 | 4.3.8 |
Affected products
4- symfony/symfonydescription
- ghsa-coords2 versions
>= 4.1.0, < 4.2.12+ 1 more
- (no CPE)range: >= 4.1.0, < 4.2.12
- (no CPE)range: >= 4.1.0, < 4.2.12
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-4vpc-5jx4-cfqgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2019-18886ghsaADVISORY
- symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionalitynvdVendor AdvisoryWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2019-18886.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18886.yamlghsaWEB
- github.com/symfony/symfony/releases/tag/v4.3.8nvdRelease NotesWEB
- symfony.com/blog/symfony-4-3-8-releasednvdRelease NotesWEB
- symfony.com/cve-2019-18886ghsaWEB
News mentions
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