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CVE-2017-11879

25
FAUCET Score

CVE-2017-11879 is an ASP.NET Core 2.0 vulnerability that allows an attacker to steal user login session information, such as cookies or authentication tokens, through a specially crafted URL. With a CVSS score of 8.8 (High), this vulnerability is easily exploitable over a network with low attack complexity, potentially leading to high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation is reported, the vulnerability has garnered significant community discussion and media coverage, indicating awareness despite its inactive status on the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
9.40%
Probability of exploitation in next 30 days
EPSS Percentile
94.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0940 is in the 95th percentile among its peer group of 14,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.0
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.0.3
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Mvc.CoreFixed in: 2.0.1

Vendor Advisories (2)

nugetGHSA-3wcj-rg8q-9cqvhigh

Open redirect in ASP.NET Core

May 14, 2022
microsoft2017-Nov/CVE-2017-11879Important

ASP.NET Core Elevation Of Privilege Vulnerability

Nov 14, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-11879
Issue TrackingPatchVendor Advisory
securityfocus.com / bid/101713
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039793
Issue TrackingThird Party AdvisoryVDB Entry