CVE-2025-40925

CVE-2025-40925: Starch versions 0.14 and earlier generate session ids insecurely

Vendor Bluefeet
Product Starch
Weakness CWE-340
Published September 20, 2025
Last update September 22, 2025

CVSS base score

What the vulnerability does

01Description

Starch versions 0.14 and earlier generate session ids insecurely. The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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.

Key dates

02Disclosure timeline

September 20, 2025 CVE published
September 22, 2025 Record updated