CVE-2018-8171
Security feature bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-8171- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-8171- Updated
- 2026-11-02
EUVDEUVD-2018-0698 No score
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.
- Record
EUVD-2018-0698- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vhvh-528q-ff3p
Security feature bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated
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.
- Record
GHSA-vhvh-528q-ff3p- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-8171- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-vhvh-528q-ff3p
Security feature bypass vulnerability exists in ASP.NET when the number of incorrect login attempts is not validated
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.
- Record
GHSA-vhvh-528q-ff3p- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Microsoft.AspNetCore.IdentityNuGet |
1.0.0 to 1.0.5 | 1.0.6 |
Microsoft.AspNetCore.IdentityNuGet |
1.1.0 to 1.1.5 | 1.1.6 |
Microsoft.AspNetCore.IdentityNuGet |
2.0.0 to 2.0.3 | 2.0.4 |
Microsoft.AspNetCore.IdentityNuGet |
2.1.0 to 2.1.1 | 2.1.2 |
Microsoft.AspNetCore.IdentityNuGet |
1.0.0 up to 1.0.6, plus listed versions 1.0.11.0.21.0.31.0.41.0.5 |
1.0.6 |
Microsoft.AspNetCore.IdentityNuGet |
1.1.0 up to 1.1.6, plus listed versions 1.1.11.1.21.1.31.1.41.1.5 |
1.1.6 |
Microsoft.AspNetCore.IdentityNuGet |
2.0.0 up to 2.0.4, plus listed versions 2.0.12.0.22.0.3 |
2.0.4 |
Microsoft.AspNetCore.IdentityNuGet |
2.1.0 up to 2.1.2, plus listed versions 2.1.1 |
2.1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-8171 is a high vulnerability (CVSS 7.5) in Microsoft Asp.net, published July 11, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 10.8%, the 95th percentile. Fixed in Microsoft.AspNetCore.Identity 1.0.6.