CVE-2025-40923

Published Jul 16, 2025

Last updated 2 days ago

Overview

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.
Source
9b29abf9-4ab0-4765-b253-1875cd9b441e
NVD status
Awaiting Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.3
Impact score
3.4
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Severity
HIGH

Weaknesses

9b29abf9-4ab0-4765-b253-1875cd9b441e
CWE-338

Social media

Hype score
Not currently trending