🛡️ CVE-2025-40905 — www\

🟠 CVSS 7.3 — High ✅ No Known Exploit CWE-338 NVD
7.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2025-40905 is classified as CWE-338: Use of Cryptographically Weak PRNG. A general-purpose random number generator is used where a cryptographic one is required.

Affected software

CVE-2025-40905 is recorded against 1 package.

  • www\ (fixed in 1.000)

Timeline and source

Published on 13 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

metacpan.org
perldoc.perl.org
security.metacpan.org
www.openwall.com

CVE-2025-40905 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE CWE-338
Public Exploit ✅ No
Source NVD
Published 2026-02-13
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
www\ — 1.000

Site Security Check

Is www\ part of your stack?

CVE-2025-40905 is rated CVSS 7.3 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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