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

roundcube regression
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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