CVE-2025-40923 describes an insecure session ID generation vulnerability in Plack-Middleware-Session for Perl, specifically versions prior to 0.35. The default session ID generator uses predictable inputs like the PID, epoch time, and the cryptographically weak built-in rand function, making session IDs guessable. This flaw carries a CVSS score of 7.3 (HIGH) due to its network-based attack vector, low complexity, and potential for low impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| MIYAGAWA | Plack::Middleware::Session | >= 0.01, < 0.35CNA affecteddefault unaffected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.