Horde IMP Status.PHP3 Cross-Site Scripting Vulnerability Solution:
The vendor recommends upgrading to IMP 3.1 If this is not possible, a patched version of the 2.2 series is available. Install either the upgrade or the patch.
Additional upgrades are available.
Horde IMP 2.2.6
Horde IMP 2.2.7
Horde IMP 3.0