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CVE-2025-68645

8.8
HIGHCVSS v3.1 Base Score
47.55%
MEDIUM RiskEPSS (98th percentile)
KEV

A Local File Inclusion (LFI) vulnerability exists in the Webmail Classic UI of Zimbra Collaboration (ZCS) 10.0 and 10.1 because of improper handling of user-supplied request parameters in the RestFilter servlet. An unauthenticated remote attacker can craft requests to the /h/rest endpoint to influence internal request dispatching, allowing inclusion of arbitrary files from the WebRoot directory.

Published: 12/22/2025
Modified: 1/23/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability

Vendor / Product:

Synacor Zimbra Collaboration Suite (ZCS)

Required Action:

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

Due Date: 2/12/2026(OVERDUE)
Added to KEV:

1/22/2026

Notes:

https://wiki.zimbra.com/wiki/Security_Center ; https://nvd.nist.gov/vuln/detail/CVE-2025-68645

Vulnerability Summary

CVSS v3 Score

8.8HIGH

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

EPSS Score (Exploitation Probability)

47.55%MEDIUM Exploitation Risk
98th percentile

This vulnerability has a 47.55% probability of being exploited in the next 30 days, ranking higher than 98% of all scored CVEs.

CWE Classification

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Similar SeverityHIGH