CVE-2019-7550
MEDIUMJForum 2.1.8 - Unauthenticated User Enumeration via Username Check Endpoint
Title source: llmDescription
In JForum 2.1.8, an unauthenticated, remote attacker can enumerate whether a user exists by using the "create user" function. If a register/check/username?username= request corresponds to a username that exists, then an "is already in use" error is produced. NOTE: this product is discontinued.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/
Scores
CVSS v3
5.3
EPSS
0.0184
EPSS Percentile
76.2%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-209
Status
published
Products (1)
jforum/jforum
2.1.8
Published
Feb 12, 2019
Tracked Since
Feb 18, 2026