An unauthenticated calendar sender can place active markup in a COUNTER message's RFC From address. Selecting the message in Zimbra Classic triggers stored XSS, allowing the attacker to access mailbox data and act as the victim.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories |
|
History
Mon, 28 Sep 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Sat, 26 Sep 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Zimbra
Zimbra zimbra Collaboration Suite |
|
| Vendors & Products |
Zimbra
Zimbra zimbra Collaboration Suite |
Fri, 25 Sep 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | An unauthenticated calendar sender can place active markup in a COUNTER message's RFC From address. Selecting the message in Zimbra Classic triggers stored XSS, allowing the attacker to access mailbox data and act as the victim. | |
| Title | Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Crafted Calendar COUNTER Message From Address | |
| Weaknesses | CWE-79 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: rapid7
Published: 2026-09-25T13:58:05.368Z
Updated: 2026-09-28T12:39:55.319Z
Reserved: 2026-09-18T12:22:43.194Z
Link: CVE-2026-93647
Updated: 2026-09-28T12:39:52.413Z
Status : Awaiting Analysis
Published: 2026-09-25T14:17:23.673
Modified: 2026-09-29T21:29:07.663
Link: CVE-2026-93647
No data.