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Vulnerability · Published Jul 17, 2025 · Assigned by CPANSec

CVE-2025-40924Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely

Medium 6.5

In plain English

A medium-severity security flaw in Catalyst::Plugin::Session from HAARG. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 77.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely. The session id is generated from a (usually SHA-1) hash of a simple counter, the epoch time, the built-in rand function, the PID and the current Catalyst context. This information is of low entropy. 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libcatalyst-plugin-session-perlno fix listedDEBIAN-CVE-2025-40924
Debian:13libcatalyst-plugin-session-perlno fix listedDEBIAN-CVE-2025-40924
Debian:14libcatalyst-plugin-session-perl0.44-1DEBIAN-CVE-2025-40924
Ubuntu:22.04:LTSlibcatalyst-plugin-session-perlno fix listedUBUNTU-CVE-2025-40924
Ubuntu:24.04:LTSlibcatalyst-plugin-session-perlno fix listedUBUNTU-CVE-2025-40924
Ubuntu:25.10libcatalyst-plugin-session-perlno fix listedUBUNTU-CVE-2025-40924
Ubuntu:26.04:LTSlibcatalyst-plugin-session-perlno fix listedUBUNTU-CVE-2025-40924
Ubuntu:26.10libcatalyst-plugin-session-perlno fix listedUBUNTU-CVE-2025-40924

Affected products (as reported)

VendorProductVersions
HAARG Catalyst::Plugin::Session 0.01 – before 0.44

Weakness: CWE-340, CWE-338 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References