In JForum 2.1.8, an unauthenticated, remote attacker can enumerate whether a user exists by using the "create user" function
Published Feb 12, 2019
5.3
MEDIUMCVSS 3.0
EPSS 1.84%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.84% (0.01842) | 78.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.84% (0.01842) | 76.17th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.44% (0.00443) | 61.21th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.29% (0.00289) | 69.83th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.29% (0.00289) | 68.11th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.29% (0.00289) | 65.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.41% (0.00411) | 69.86th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.50% (0.04499) | 88.81th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.30% (0.02304) | 53.71th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.30% (0.02304) | 0.00th | v1 |
References (1)
- https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/ x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/ | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.