Vulnerability Description
Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a protocol compliance bug causes the client to generate a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). The client public value is being generated from a private value that is 4 bits below the specification. This reduces the protocol's designed security margin it is now practically exploitable. The servers full sized 2048 bit random number is used to create the shared session key and password proof. This is fixed in version 2.0.1.
Related Weaknesses (CWE)
References
- https://github.com/simbo1905/thinbus-srp-npm/issues/28
- https://github.com/simbo1905/thinbus-srp-npm/pull/30/commits/4aeaea2366e090765a8
- https://github.com/simbo1905/thinbus-srp-npm/security/advisories/GHSA-8q6v-474h-
FAQ
What is CVE-2025-54885?
CVE-2025-54885 is a documented vulnerability. Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a protocol compliance bug causes the client to gene...
How severe is CVE-2025-54885?
CVSS scoring is not yet available for CVE-2025-54885. Check NVD for updates.
Is there a patch for CVE-2025-54885?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.