ASP .NET
CVE-2018-0787 — ASP.NET Core Elevation of Privilege Vulnerability
Executive Summary
An elevation of privilege vulnerability exists when a Kestrel web application fails to validate web requests. An attacker who successfully exploited this vulnerability could perform HTML injection attacks. To exploit the vulnerability, an attacker could send a specially crafted request, containing injected HTML, to the web application. The specially crafted request would initiate a "password reset" email to the target user. Depending on the target user email client, the injected HTML could trigger as soon as the target user opens the "password reset" e-mail. The security update addresses the vulnerability by correcting how a Kestrel web application validates web requests.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.09752
probability of exploitation in the next 30 days
0.95092 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| ASP.NET Core 2.0 | Commit (Security Update) |
Important | Elevation of Privilege | Yes |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
Commit |
Security Update | Yes |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
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