This is a security update to the stable version 1.6 of Roundcube Webmail.
It provides fixes to recently reported security vulnerabilities:

• Fix XSS vulnerability in post-processing of sanitized HTML content [CVE-2024-42009]
• Fix XSS vulnerability in serving of attachments other than HTML or SVG [CVE-2024-42008]
• Fix information leak (access to remote content) via insufficient CSS filtering [CVE-2024-42010]

Credits to Oskar Zeino-Mahmalat (Sonar) for all these findings and thanks for providing a very detailed report in a private communication.

This version is considered stable and we recommend to update all productive installations of Roundcube 1.6.x with it. Please do backup your data before updating!

CHANGELOG

• Managesieve: Protect special scripts in managesieve_kolab_master mode
• Fix newmail_notifier notification focus in Chrome (#9467)
• Fix fatal error when parsing some TNEF attachments (#9462)
• Fix double scrollbar when composing a mail with many plain text lines (#7760)
• Fix decoding mail parts with multiple base64-encoded text blocks (#9290)
• Fix bug where some messages could get malformed in an import from a MBOX file (#9510)
• Fix invalid line break characters in multi-line text in Sieve scripts (#9543)
• Fix bug where "with attachment" filter could fail on some fts engines (#9514)
• Fix bug where an unhandled exception was caused by an invalid image attachment (#9475)
• Fix bug where a long subject title could not be displayed in some cases (#9416)
• Fix infinite loop when parsing malformed Sieve script (#9562)
• Fix bug where imap_conn_option's 'socket' was ignored (#9566)
• Fix XSS vulnerability in post-processing of sanitized HTML content [CVE-2024-42009]
• Fix XSS vulnerability in serving of attachments other than HTML or SVG [CVE-2024-42008]
• Fix information leak (access to remote content) via insufficient CSS filtering [CVE-2024-42010]