wasp-lang wasp up to 0.16.5 OAuth default permission

Summaryinfo

A vulnerability identified as critical has been detected in wasp-lang wasp up to 0.16.5. This impacts an unknown function of the component OAuth. The manipulation leads to default permission. This vulnerability is referenced as CVE-2025-49006. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in wasp-lang wasp up to 0.16.5. It has been rated as critical. This issue affects some unknown functionality of the component OAuth. The manipulation with an unknown input leads to a default permission vulnerability. Using CWE to declare the problem leads to CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. Impacted is integrity. The summary by CVE is:

Wasp (Web Application Specification) is a Rails-like framework for React, Node.js, and Prisma. Prior to version 0.16.6, Wasp authentication has a vulnerability in the OAuth authentication implementation (affecting only Keycloak with a specific config). Wasp currently lowercases OAuth user IDs before storing / fetching them. This behavior violates OAuth and OpenID Connect specifications and can result in user impersonation, account collisions, and privilege escalation. In practice, out of the OAuth providers that Wasp auth supports, only Keycloak is affected. Keycloak uses a lowercase UUID by default, but users can configure it to be case sensitive, making it affected. Google, GitHub, and Discord use numerical IDs, making them not affected. Users should update their Wasp version to `0.16.6` which has a fix for the problematic behavior. Users using Keycloak can work around the issue by not using a case sensitive user ID in their realm configuration.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-49006 since 05/29/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1222 for this issue.

Upgrading to version 0.16.6 eliminates this vulnerability. Applying the patch 433b9b7f491c172db656fb94cc85e5bd7d614b74 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-17468). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• wasp-lang

Name

• wasp

Version

• 0.16.0
• 0.16.1
• 0.16.2
• 0.16.3
• 0.16.4
• 0.16.5

License

• open-source

Website

• Product: https://github.com/wasp-lang/wasp/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion