Docker
CVE-2026-27899
HIGH
GHSA-5rmx-256w-8mj9
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management. Prior to version 2.1.3, any authenticated non-admin user can become a full administrator by sending a single PUT request to their own user profile endpoint with "IsAdmin": true in the JSON body. After logging out and back in, the session picks up admin privileges from the database. When a user updates their own profile, the server parses the full JSON body into the user model, including the IsAdmin boolean field. A function responsible for preserving calculated or protected attributes pins certain fields to their database values (such as base model data, linked peer count, and authentication data), but it does not do this for IsAdmin. As a result, whatever value the client sends for IsAdmin is written directly to the database. After the exploit, the attacker has full admin access to the WireGuard VPN management portal. The problem was fixed in v2.1.3. The docker images for the tag 'latest' built from the master branch also include the fix.
AnalysisAI
Privilege escalation in WireGuard Portal prior to version 2.1.3 allows authenticated non-admin users to gain full administrator access by modifying their own user profile with an IsAdmin flag set to true. The vulnerability exists because the server fails to properly validate and restrict the IsAdmin field during profile updates, allowing the privilege change to persist after re-authentication. Affected deployments require immediate patching to version 2.1.3 or later to prevent unauthorized administrative access.
Technical ContextAI
Classified as CWE-269 (Improper Privilege Management). Affects Wireguard Portal. WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management. Prior to version 2.1.3, any authenticated non-admin user can become a full administrator by sending a single PUT request to their own user profile endpoint with "IsAdmin": true in the JSON body. After logging out and back in, the session picks up admin privileges from the database. When a user updates their own profile, the server parses the full JSON body into the user model, including the `Is
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
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Same weakness CWE-269 – Improper Privilege Management
View allVendor StatusVendor
SUSE
Severity: HighShare
External POC / Exploit Code
Leaving vuln.today