Security Advisories (4)
CVE-2013-10031 (2025-12-09)

Plack-Middleware-Session versions before 0.17 may be vulnerable to HMAC comparison timing attacks

CVE-2014-125112 (2026-03-26)

Plack::Middleware::Session::Cookie versions through 0.21 for Perl allows remote code execution. Plack::Middleware::Session::Cookie versions through 0.21 has a security vulnerability where it allows an attacker to execute arbitrary code on the server during deserialization of the cookie data, when there is no secret used to sign the cookie.

CVE-2025-40923 (2025-07-16)

Plack-Middleware-Session before version 0.35 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. Predicable session ids could allow an attacker to gain access to systems.

CPANSA-Plack-Middleware-Session-2014-01 (2014-08-11)

Plack::Middleware::Session::Cookie 0.21 has a security vulnerability where it allows an attacker to execute arbitrary code on the server, when the middleware is enabled without a secret.

Changes for version 0.09_03 - 2010-02-02

  • Fixed so the default Cookie path is now correctly set to '/' You can override that by setting path = undef in psgix.session.options. (Reported by tomyhero)

Changes for version 0.09_02 - 2010-01-30

  • Fixed a bug in Cookie serialization where it breaks the response headers generated by applications (tomyhero)

Changes for version 0.09_01 - 2010-01-30

  • Reworked the internal code and API a lot, so Session persistence and retrieval are handled in a more stateless way
  • INCOMPATIBLE: psgix.session is now a hash reference rather than an object. If you need an object like before, do: use Plack::Session; $session = Plack::Session->new($env);
  • Added Plack::Middleware::Session::Cookie which uses CookieStore
  • Updated Cookie handling code to work with Plack 0.99 and later

Modules

Middleware for session management
Session middleware that saves session data in the cookie
Middleware for session management
Basic parameter-based session state
Basic cookie-based session state
Basic in-memory session store
Cache session store
Basic file-based session store