Roundcube 1.6.3 has been released. "Fix cross-site scripting (XSS) vulnerability in handling of linkrefs in plain text messages" Announcement: https://roundcube.net/news/2023/09/15/security-update-1.6.3-released Changelog: https://github.com/roundcube/roundcubemail/releases/tag/1.6.3 Reproducible: Always
Whoops. Looks like I was too slow. 1.6.3 already got added to the tree: https://github.com/gentoo/gentoo/commit/7706728f2f0956986948e08b195d2b2ef0a761f9