An issue was discovered in Zimbra Collaboration (ZCS) through 10.1. A Cross-Site Scripting (XSS) vulnerability exists in Zimbra webmail due to insufficient validation of the content type metadata when importing files into the briefcase. Attackers can exploit this issue by crafting a file with manipulated metadata, allowing them to bypass content type checks and execute arbitrary JavaScript within the victim's session.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Zimbra Collaboration | — | Upgrade Zimbra Collaboration to the latest version | Jul 30, 2025 | Jul 30, 2025 |
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