h44z wg-portal up to 2.1.2 privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in h44z wg-portal up to 2.1.2. This impacts an unknown function. Executing a manipulation can lead to privileges management. This vulnerability is registered as CVE-2026-27899. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in h44z wg-portal up to 2.1.2. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-27899 since 02/24/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 2.1.3 eliminates this vulnerability.

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Productinfo

Vendor

• h44z

Name

• wg-portal

Version

• 2.1.0
• 2.1.1
• 2.1.2

Website

• Product: https://github.com/h44z/wg-portal/

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