What’s Vulnerable › Vulnerabilities

CVE-2025-68645: Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-01-22
• EPSS: 48.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-22 · updated 2026-06-17
• Weakness: CWE-98

Description

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.

Affected products

• Zimbra Collaboration: from 10.0.0 before 10.0.18; from 10.1.0 before 10.1.13 — fixed in 10.0.18, 10.1.13

How to fix

Upgrade to a fixed version: Zimbra Collaboration 10.0.18, 10.1.13. Check the vendor advisory for mitigations.

References

• https://wiki.zimbra.com/wiki/Security_Center
• https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645

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