Security Advisories (9)
Mojo::DOM did not correctly parse <script> tags.
Small sessions could be used as part of a brute-force attack to decode the session secret.
A bug in format detection can potentially be exploited for a DoS attack.
Mojo::UserAgent::CookieJar leaks old cookies because of the missing host_only flag on empty domain.
Mojo::UserAgent was not checking peer SSL certificates by default.
Mojo::Util secure_compare can leak the string length. By immediately returning when the two strings are not the same length, the function allows an attacker to guess the length of the secret string using timing attacks.
GET requests with embedded backslashes can be used to access local files on Windows hosts
Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default. These predictable default secrets can be exploited by an attacker to forge session cookies. An attacker who knows or guesses the secret could compute valid HMAC signatures for the session cookie, allowing them to tamper with or hijack another user’s session.
- https://github.com/mojolicious/mojo/pull/1791
- https://github.com/mojolicious/mojo/pull/2200
- https://www.synacktiv.com/publications/baking-mojolicious-cookies
- https://medium.com/securing/baking-mojolicious-cookies-revisited-a-case-study-of-solving-security-problems-through-security-by-13da7c225802
- https://metacpan.org/release/SRI/Mojolicious-9.39/source/lib/Mojolicious.pm#L51
- https://github.com/hashcat/hashcat/pull/4090
- https://lists.debian.org/debian-perl/2025/05/msg00016.html
- https://lists.debian.org/debian-perl/2025/05/msg00017.html
- https://lists.debian.org/debian-perl/2025/05/msg00018.html
- https://github.com/mojolicious/mojo/pull/2252
- https://docs.mojolicious.org/Mojolicious/Guides/FAQ#What-does-Your-secret-passphrase-needs-to-be-changed-mean
Mojolicious versions from 7.28 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys.
- https://perldoc.perl.org/functions/rand
- https://metacpan.org/release/SRI/Mojolicious-9.39/source/lib/Mojo/Util.pm#L181
- https://metacpan.org/release/SRI/Mojolicious-9.38/source/lib/Mojolicious/Command/Author/generate/app.pm#L202
- https://github.com/mojolicious/mojo/pull/2200
- https://metacpan.org/release/SRI/Mojolicious-7.28/source/lib/Mojolicious/Command/generate/app.pm#L220
- https://security.metacpan.org/docs/guides/random-data-for-security.html
- https://github.com/hashcat/hashcat/pull/4090
- https://lists.debian.org/debian-perl/2025/05/msg00016.html
- https://lists.debian.org/debian-perl/2025/05/msg00017.html
- https://lists.debian.org/debian-perl/2025/05/msg00018.html
NAME
Mojo::Home - Home sweet home
SYNOPSIS
use Mojo::Home;
# Find and manage the project root directory
my $home = Mojo::Home->new;
$home->detect;
say $home->child('templates', 'layouts', 'default.html.ep');
say "$home";
DESCRIPTION
Mojo::Home is a container for home directories based on Mojo::File.
METHODS
Mojo::Home inherits all methods from Mojo::File and implements the following new ones.
detect
$home = $home->detect;
$home = $home->detect('My::App');
Detect home directory from the value of the MOJO_HOME environment variable or the location of the application class.
mojo_lib_dir
my $path = $home->mojo_lib_dir;
Path to lib directory in which Mojolicious is installed as a Mojo::Home object.
rel_file
my $path = $home->rel_file('foo/bar.html');
Return a new Mojo::Home object relative to the home directory.
OPERATORS
Mojo::Home inherits all overloaded operators from Mojo::File.
SEE ALSO
Module Install Instructions
To install Mojolicious, copy and paste the appropriate command in to your terminal.
cpanm Mojolicious
perl -MCPAN -e shell
install Mojolicious
For more information on module installation, please visit the detailed CPAN module installation guide.