CVE-2019-7550 json
In JForum 2.1.8, an unauthenticated, remote attacker can enumerate whether a user exists by using the "create user" function.
published 2019-02-12 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-17089
- cvss
- 5.3
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.84% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- criticalstart.com https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-209 Generation of Error Message Containing Sensitive Information
References
-
criticalstart.com
/2019/02/information-disclosure-in-jforum-2-1-x-syntax/
exploit, third-party-advisory
Sources
- CVE List CVE-2019-7550
- NVD CVE-2019-7550
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