Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-40926— Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely

Quick assessment

Affected
KAZEBURO Plack::Middleware::Session::Simple
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Plack::Middleware::Session::Simple是Masahiro Nagano个人开发者的一个轻量级的会话管理中间件。 Plack::Middleware::Session::Simple 0.04及之前版本存在安全漏洞，该漏洞源于使用不安全的随机数生成器生成会话ID，可能导致会话ID被预测。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.46% · P40

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-40926

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely
Source: CVE Program / CVE List V5
Vulnerability Description
Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely. The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. 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. Predictable session ids could allow an attacker to gain access to systems. Plack::Middleware::Session::Simple is intended to be compatible with Plack::Middleware::Session, which had a similar security issue CVE-2025-40923.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可预测问题
Source: CVE Program / CVE List V5
Vulnerability Title
Plack::Middleware::Session::Simple 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Plack::Middleware::Session::Simple是Masahiro Nagano个人开发者的一个轻量级的会话管理中间件。 Plack::Middleware::Session::Simple 0.04及之前版本存在安全漏洞，该漏洞源于使用不安全的随机数生成器生成会话ID，可能导致会话ID被预测。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
KAZEBURO Plack::Middleware::Session::Simple 0 ~ 0.05 -

II. Public POCs for CVE-2025-40926

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-40926

请登录查看更多情报信息。

Patches & Fixes for CVE-2025-40926 (3)

Vendor Advisories for CVE-2025-40926 (2)

IV. Related Vulnerabilities

Same vendor: KAZEBURO
Same weakness: CWE-340