Remote Code Execution Vulnerability in Plack::Middleware::Session::Cookie by Perl
CVE-2014-125112

9.8CRITICAL

Key Information:

Vendor

Miyagawa

Status
Plack::middleware::session::cookie
Vendor
CVE Published:
26 March 2026

What is CVE-2014-125112?

Plack::Middleware::Session::Cookie, in versions prior to 0.21, exposes a significant vulnerability that allows attackers to perform remote code execution. This security issue arises during the deserialization process of cookie data when no secret is used to sign the cookie, facilitating unauthorized access and manipulation of server-side code. It is crucial for users relying on this middleware to upgrade to the latest version to mitigate potential risks.

Affected Version(s)

Plack::Middleware::Session::Cookie 0 <= 0.21

References

https://gist.github.com/miyagawa/2b8764af908a0dacd43d
technical-description
https://metacpan.org/release/MIYAGAWA/Plack-Middleware-Se...
release-notes

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

mala (@bulkneets)
.