CVE-2022-2525: Improper Restriction of Excessive Authentication Attempts in calibreweb

The vulnerability CWE-307 explicitly relates to missing authentication attempt restrictions. In web applications, this typically manifests in the login handler function. While specific code isn't available, the pattern matches: 1) Authentication endpoints are common attack surfaces for brute-force attacks 2) The commit fixing this (0.6.20) would logically add attempt tracking/rate-limiting 3) The vulnerability title directly implicates the authentication flow. The login function is the most probable location where failed attempt counters or delay mechanisms would be missing prior to patching.