This vulnerability involves an authorization bypass in the Ribblr - Crochet & Knitting iOS app (version 2.5) where an authenticated user can exploit a user-controlled key to circumvent authorization checks. The weakness is categorized as CWE-639, indicating improper authorization enforcement due to reliance on user-controllable input. The CVSS 4.0 base score is 5.3 (medium severity), reflecting network attack vector, low complexity, no user interaction, and limited confidentiality impact. No official fix or patch has been documented, and the service is not cloud-based, so remediation depends on vendor action.

An authenticated user can bypass authorization mechanisms, potentially gaining access to functions or data they should not be authorized to use. This could lead to unauthorized actions within the application, impacting data integrity or user privacy. However, the impact is limited by the need for authentication and the absence of known exploits.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should limit access to trusted authenticated users only and monitor for unusual activity. No vendor advisory or patch links are currently available, so no official remediation steps can be recommended beyond awaiting a vendor fix.