In Jitsi Meet before 2.0.9779, the functionality to share an image using giphy was implemented in an insecure way, resulting in clients loading GIFs from any arbitrary URL if a message from another participant contains a URL encoded in the expected format.
https://github.com/jitsi/security-advisories/blob/master/advisories/JSA-2024-0002.md
https://github.com/jitsi/jitsi-meet/compare/jitsi-meet_9672...jitsi-meet_9673