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Dancer-1.3522
⭐ Starred 738 / Dancer::Serializer::JSONP
Security Advisories (1)
CVE-2026-5080 (2026-04-30)

Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the built-in rand() function to return a number between 0 and 999-billion, and concatenating that result three times. The path name might be known or guessed by an attacker, especially for applications known to be written using Dancer with standard installation locations. The epoch time can be guessed by an attacker, and may be leaked in the HTTP header. The process id comes from a small set of numbers, and workers may have sequential process ids. The built-in rand() function is seeded with 32-bits and is considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

Dancer::Serializer::JSONP - serializer for handling JSONP data

VERSION

version 1.3522

SYNOPSIS

DESCRIPTION

This class is a subclass of Dancer::Serializer::JSON with support for JSONP.

In order to use this engine, use the template setting:

serializer: JSONP

This can be done in your config.yml file or directly in your app code with the set keyword. This serializer will not be used when the serializer is set to mutable.

All configuration options mentioned in Dancer::Serializer::JSON apply here, too.

METHODS

serialize

Serialize a data structure to a JSON structure with surrounding javascript callback method. The name of the callback method is obtained from the request parameter callback.

deserialize

See Dancer::Serializer::JSON#deserialize.

content_type

Return 'application/javascript'

SEE ALSO

Dancer::Plugin::CORS is a modern alternative to JSONP, but with limited browser support. Today, JSONP can be a serious fallback solution when CORS is not supported by a browser.

AUTHOR

David Zurborg, <zurborg at cpan.org>

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2010 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.