CVE-2017-11879
ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL aka "ASP.NET Core Elevation Of Privilege Vulnerability".
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL aka "ASP.NET Core Elevation Of Privilege Vulnerability".
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 9.40% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-601
- Affected
- microsoft/asp.net core
- Source
- secure@microsoft.com
EPSS moved from 7.0% on 21 September 2026 to 9.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/101713Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039793Issue Tracking, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879Issue Tracking, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/101713Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039793Issue Tracking, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879Issue Tracking, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.