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GHSA-5rmx-256w-8mj9
No affected components available
Privilege Escalation to Admin via User Self-Update in wg-portal
Summary
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.
Tested against wg-portal v2.1.2 (Docker image wgportal/wg-portal:v2).
Root Cause
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.
Impact
After the exploit, the attacker has full admin access to the WireGuard VPN management portal. They can:
- Read and modify every user account
- Create, modify, and delete WireGuard peers on any interface
- View WireGuard interface configurations
- Disable or lock other user accounts
- Access the full user list and their API tokens
Patches
The problem was fixed in the latest release, v2.1.3. The docker images for the tag 'latest' built from the master branch also include the fix.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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