Mojo::DOM did not correctly parse <script> tags.

• https://github.com/mojolicious/mojo/commit/6f195d85db6756022d3599f7d2634975688c9550
• https://github.com/mojolicious/mojo/issues/2014
• https://github.com/mojolicious/mojo/issues/2015

Small sessions could be used as part of a brute-force attack to decode the session secret.

• https://github.com/mojolicious/mojo/pull/1791

A bug in format detection can potentially be exploited for a DoS attack.

• https://github.com/mojolicious/mojo/issues/1736
• https://github.com/mojolicious/mojo/commit/a0c4576ffb11c235088550de9ba7ac4196e1953c

Mojo::UserAgent::CookieJar leaks old cookies because of the missing host_only flag on empty domain.

• https://github.com/mojolicious/mojo/pull/1192
• https://github.com/mojolicious/mojo/issues/1185
• https://github.com/mojolicious/mojo/commit/c16a56a9d6575ddc53d15e76d58f0ebcb0eeb149

Directory traversal on Windows

• https://github.com/mojolicious/mojo/issues/738
• https://github.com/mojolicious/mojo/commit/9ffa38fca73a9ddee91cbc70e0696268d500edde

Mojo::UserAgent was not checking peer SSL certificates by default.

• https://github.com/mojolicious/mojo/pull/1226
• https://github.com/mojolicious/mojo/commit/d3cbbad890673612fdbdea63fdd522b516f6104c

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.

• https://github.com/mojolicious/mojo/pull/1601

GET requests with embedded backslashes can be used to access local files on Windows hosts

• https://github.com/mojolicious/mojo/pull/1217
• https://github.com/mojolicious/mojo/commit/23ebe051d9378f0f122e3c908845fc0c2cae0106

Context sensitivity of method param could lead to parameter injection attacks.

• https://github.com/mojolicious/mojo/commit/a815d4797145f872ef6e9f1270841eda1d410afb

Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as a HMAC session secret by default. These predictable default secrets can be exploited 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/hashcat/hashcat/pull/4090
• https://github.com/mojolicious/mojo/pull/1791
• https://github.com/mojolicious/mojo/pull/2200
• 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://www.synacktiv.com/publications/baking-mojolicious-cookies
• https://www.cve.org/CVERecord?id=CVE-2024-58134