/ 
Dancer2-0.05
⭐ Starred 552 / Dancer2::Plugin::Ajax
Security Advisories (2)
CPANSA-Dancer2-2018-01 (2018-01-30)

There is a potential RCE with regards to Storable. We have added session ID validation to the session engine so that session backends based on Storable can reject malformed session IDs that may lead to exploitation of the RCE.

CVE-2026-13577 (2026-07-20)

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id when both Math::Random::ISAAC::XS and Crypt::URandom are unavailable. The fallback session id is generated from a SHA-1 hash of a call to the built-in rand function, the absolute path of the Dancer2::Core::Role::SessionFactory module, an internal counter, the process id, the module instance memory address, and a shuffled string of characters (using the List::Util::shuffle function, which also uses the built-in rand function). These are all low-entropy and easily guessed sources. The built-in rand() function is seeded with 32-bits and considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

Dancer2::Plugin::Ajax - a plugin for adding Ajax route handlers

VERSION

version 0.05

SYNOPSIS

package MyWebApp;

use Dancer2;
use Dancer2::Plugin::Ajax;

ajax '/check_for_update' => sub {
    # ... some Ajax code
};

dance;

DESCRIPTION

The ajax keyword which is exported by this plugin allow you to define a route handler optimized for Ajax queries.

The route handler code will be compiled to behave like the following:

  • Pass if the request header X-Requested-With doesnt equal XMLHttpRequest

  • Disable the layout

  • The action built is a POST request.

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 by Alexis Sukrieh.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.