CVE-2025-59420 Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.4, Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical...

TikTok Assures U.S. Lawmakers it's Working to Safeguard User Data From Chinese Staff

Following heightened worries that U.S. users' data had been accessed by TikTok engineers in China between September 2021 and January 2022, the company sought to assuage U.S. lawmakers that it's taking steps to "strengthen data security." The admission that some China-based employees can access...

Critical Holes in OAuth, OpenID Could Leak Information, Redirect Users

UPDATE — A serious vulnerability in the OAuth and OpenID protocols could lead to complications for those who use the services to log in to websites like Facebook, Google, LinkedIn, Yahoo, and Microsoft among many others. OpenID and OAuth are commonly used authorization protocols. The protocols ar...