Description
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite | < 10.1.20 | 10.1.20 |
Advisories 1
- WID-SEC-2026-2429 Synacor Zimbra: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2026
References
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories vendor-advisory