Zimbra Collaboration Suite Cross-Account Authorization Bypass via Forged Shared-File Records
A cross-account authorization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user to insert forged shared-file records into another user's mailbox through FileSharedWithMeRequest. The request bypasses delegated-account authorization and accepts attacker-selected file metadata, owner identifie…
Severity medium: primary CNA CVSS 4.3 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-10-23T13:26:11.070Z. Updated 2026-10-28T19:50:45.601Z.