CVE-2026-58451 — Horde IMP < 7.0.1: Path Traversal via Compose.php img src
Horde IMP versions before 7.0.1 contain a CWE-22 path traversal vulnerability in lib/Compose.php. Authenticated attackers can read arbitrary files from the server filesystem by placing traversal sequences in img src URLs. The contents can be exfiltrated as MIME parts in outgoing email. The source also states that exploitation can be achieved through CSRF against an active authenticated session.
CERT24