CVE-2025-48700mediumunder attackCWE-79

CVE-2025-48700

Published · Updated

Follow this CVE+ Monitor Zimbra Collaboration Suite

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

43Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Attendcvss 6.1epss 1.7%
from disclosure to weapon
Published on NVDJun 23
CISA KEV+301d
Action required by CISAfederal deadline: 2026-04-23

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

In short

Zimbra email allows attackers to inject malicious code into emails that runs when users view them in the Classic UI, potentially stealing sensitive information or taking control of the user's email account.

Technical detail

A Cross-Site Scripting (XSS) vulnerability in Zimbra Collaboration 8.8.15, 9.0, 10.0, and 10.1 Classic UI results from insufficient HTML sanitization, allowing attackers to inject arbitrary JavaScript via crafted tag structures and @import directives that execute in the victim's browser session without additional interaction, compromising session integrity and enabling credential/data theft.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
n/a · n/a