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Ubuntu Security Notice USN-8242-1
May 07, 2026

civicrm vulnerability
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

CiviCRM could be made to run malicious JavaScript in the user's browser
if it received specially crafted input.

Software Description:
- civicrm: Constituent relationship management solution

Details:

Takuya Aramaki discovered that Smarty, vendored in CiviCRM, did not
properly escape JavaScript code. An attacker could possibly use this issue
to conduct a cross-site scripting attack.

Update instructions:

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

Ubuntu 22.04 LTS
  civicrm-common                  5.33.2+dfsg1-1ubuntu1+esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  civicrm-common                  5.21.2+dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  civicrm-common                  4.7.30+dfsg-1ubuntu1+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  civicrm-common                  4.7.1+dfsg-2ubuntu1+esm1
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-8242-1
  CVE-2023-28447