CVE-2025-40923 – Apache Plack-Middleware-Session Insecure Session ID Generation

CVE ID : CVE-2025-40923

Published : July 16, 2025, 1:15 p.m. | 1 hour, 20 minutes ago

Description : 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.

Severity: 0.0 | NA

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