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[USN-8097-2] roundcube regression

Posted on 18 March 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8097-2
March 18, 2026

roundcube regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

USN-8097-1 introduced a regression in roundcube

Software Description:
- roundcube: skinnable AJAX based webmail solution for IMAP servers - metapack

Details:

USN-8097-1 fixed a vulnerability in roundcube. The update caused
a regression affecting the HTML sanitizer, preventing Roundcube from rendering
any email message body. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Roundcube Webmail did not properly sanitize the
animate tag within SVG documents. An attacker could possibly use
this issue to cause a cross-site scripting attack.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS
roundcube-core 1.4.3+dfsg.1-1ubuntu0.1~esm7
Available with Ubuntu Pro
roundcube-plugins 1.4.3+dfsg.1-1ubuntu0.1~esm7
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8097-2
https://ubuntu.com/security/notices/USN-8097-1
https://launchpad.net/bugs/2144682

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