CVE-2026-65053 Horde IMP before 7.2.0 Stored Cross-Site Scripting via AppleDouble Viewer Part Name

Horde IMP's AppleDouble MIME viewer writes an attacker-controlled attachment name into an HTML status block without escaping it. In lib/Mime/Viewer/Appledouble.php, IMPrender obtains the name of the data part with IMPContents::getPartName, which returns the MIME part's own name parameter as...