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CVE-2025-68645

high CISA KEV

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

Vendor / product: Synacor — Zimbra Collaboration Suite (ZCS)

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.

CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2025-12-22 18:16
Modified: 2026-11-04 22:10
NVD status: Analyzed
Last synced 2 hours ago
Verified against the source API 2026-11-04 22:37 UTC
Exploitation
Listed in CISA KEV
Added 2026-01-22 · due 2026-02-12
Known ransomware use: Unknown

Required action (CISA)

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

Affected products

synacor / zimbra_collaboration_suite ≥10.0.0 <10.0.18, ≥10.1.0 <10.1.13

Weakness classification (CWE)

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://wiki.zimbra.com/wiki/Security_Center

References

Data sources

CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-11-04 22:37 UTC · record ↗

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