What is CVE-2025-40905?

CVE-2025-40905 is a high-severity vulnerability in Dbook Www\, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.3/10. Published 2026-02-13.

How severe is CVE-2025-40905?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Dbook Www\

CVE-2025-40905

WWW::OAuth 1.000 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.

EPSS: 0.003 (16.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Dbook Www\ — versions \
Dbook Www::oauth — versions 0

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (Third Party Advisory)
9b29abf9-4ab0-4765-b253-1875cd9b441e (Third Party Advisory)
9b29abf9-4ab0-4765-b253-1875cd9b441e (Product, Issue Tracking)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2025-40905?: CVE-2025-40905 is a high-severity vulnerability in Dbook Www\, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.3/10. Published 2026-02-13.
How severe is CVE-2025-40905?: High severity. CVSS v3 base score is 7.3 out of 10.