CVE-2025-40923 — Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely. The default session id generator returns a SHA-1 hash seeded with the built-in rand func…
Published: 2025-07-16 · CVSS: 7.3 · CVSS 3.1
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely. The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7