MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2, when a private wiki is configured, provides different error messages for failed login attempts depending on whether the username exists, which allows remote attackers to enumerate account names and conduct brute-force attacks via a series of requests
Published Nov 15, 2017
7.5
HIGHCVSS 3.0
EPSS 2.15%
Description
MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2, when a private wiki is configured, provides different error messages for failed login attempts depending on whether the username exists, which allows remote attackers to enumerate account names and conduct brute-force attacks via a series of requests.
Affected products
- Vendor n/a Product MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 Defaultn/a
- Version MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 | n/a |
|
Configuration 1
Configuration 2
- 9.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
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:H/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 v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.15% (0.02148) | 81.44th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.15% (0.02148) | 79.67th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00147) | 51.17th | v3 (v2023.03.01) |
| Feb 19, 2024 | 0.15% (0.00147) | 49.47th | v3 (v2023.03.01) |
| May 18, 2023 | 0.21% (0.00209) | 57.44th | v3 (v2023.03.01) |
| Apr 8, 2023 | 0.28% (0.00280) | 63.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00329) | 66.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.05% (0.01046) | 28.66th | v1 |
| Jan 6, 2022 | 1.05% (0.01046) | 28.03th | v1 |
| Sep 1, 2021 | 1.05% (0.01046) | 65.02th | v1 |
| Apr 14, 2021 | 1.05% (0.01046) | 0.00th | v1 |
References (3)
- http://www.securitytracker.com/id/1039812 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html x_refsource_CONFIRMMailing ListPatchVendor Advisory
- https://www.debian.org/security/2017/dsa-4036 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1039812 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html | x_refsource_CONFIRMMailing ListPatchVendor Advisory | |
| https://www.debian.org/security/2017/dsa-4036 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.