Live › vulnerability › CVE-2025-48700
Go to dashboardSynacor Zimbra Collaboration Suite has a cross-site scripting flaw that lets attackers run JavaScript inside a logged-in user's session. Attackers can use that to reach sensitive information in the mailbox.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Synacor Zimbra Collaboration Suite (ZCS) | vendor | – | – |
| synacor zimbra collaboration suite | vendor | >= 10.0.0, < 10.0.12 | 10.0.12 |
| synacor zimbra collaboration suite | vendor | >= 10.1.0, < 10.1.4 | 10.1.4 |
| synacor zimbra collaboration suite | vendor | = 8.8.15 | – |
| synacor zimbra collaboration suite | vendor | = 9.0.0 | – |
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. This issue arises from insufficient sanitization of HTML content, specifically involving crafted tag structures and attribute values that include an @import directive and other script injection vectors. The vulnerability is triggered when a user views a crafted e-mail message in the Classic UI, requiring no additional user interaction.
This page as .md · .json · in your agent: get_signal("CVE-2025-48700")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.