BIT-DISCOURSE-2025-48877 Discourse vulnerable to auto-executing of third-party code in embedded CodePen iframe

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the stable branch, version 3.5.0.beta5 of the beta branch, and version 3.5.0.beta6-dev of the tests-passed branch, Codepen is present in the default allowediframes site setting, and it can potentially auto-run arbitrary JS...