CVE-2025-48700

MEDIUMCISA KEV

6.1

Description

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.

CVE Details

CVSS v3.1 Score6.1

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published6/23/2025

Last Modified4/21/2026

Sourcenvd

Honeypot Sightings0

CISA KEV

VendorSynacor

ProductZimbra Collaboration Suite (ZCS)

Vulnerability NameSynacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability

KEV Date Added2026-04-20

Remediation Due Date2026-04-23

Ransomware UseUnknown

Affected Products

synacor:zimbra_collaboration_suite

Weaknesses (CWE)

CWE-79

References

https://wiki.zimbra.com/wiki/Security_Center(cve@mitre.org)

https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy(cve@mitre.org)

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories(cve@mitre.org)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-48700(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.