CVE-2018-8171 in the critical feed json
Security feature bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated
published 2018-07-11 8 y ago modified 2026-06-17 4 mo ago also GHSA-vhvh-528q-ff3p , EUVD-2018-0698
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 10.8%
- EPSS 10.8% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
A Security Feature Bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated, aka "ASP.NET Security Feature Bypass Vulnerability." This affects ASP.NET, ASP.NET Core 1.1, ASP.NET Core 1.0, ASP.NET Core 2.0, ASP.NET MVC 5.2.
Patch / fix
- nuget Microsoft.AspNetCore.Identity 1.0.6, 1.1.6, 2.0.4, 2.1.2
Exploit prediction
10.77% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.AspNetCore.Identity | >=1.0.0, <1.0.6 >=1.1.0, <1.1.6 >=2.0.0, <2.0.4 >=2.1.0, <2.1.2 |
1.0.6 1.1.6 2.0.4 2.1.2 |
Affected products
- Microsoft ASP.NET
- Microsoft ASP.NET Core
- Microsoft ASP.NET MVC 5.2
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2018-8171
web, patch, vendor-advisory
-
securitytracker.com
/id/1041267
vdb-entry, web, third-party-advisory
-
securityfocus.com
/bid/104659
vdb-entry, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-8171
advisory
-
github.com
/advisories/GHSA-vhvh-528q-ff3p
advisory
Sources
- CVE List CVE-2018-8171
- GitHub Advisory GHSA-vhvh-528q-ff3p
- NVD CVE-2018-8171
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.