CVE-2025-68645

Exp

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: 2025-12-22 Last update: 2026-01-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-68645 is rated Critical Active Threat (89.4/100): CVSS High severity, with high exploitation likelihood (EPSS 47.55%, 98th percentile). CISA KEV confirms active exploitation (added 2026-01-22) affecting Synacor / Zimbra Collaboration Suite (ZCS). a weakness (CWE-98) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-68645

Name: Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability · CISA KEV detail

Exploit added: 2026-01-22

Action due: 2026-02-12

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.

Exploit prediction scoring system (EPSS) score for CVE-2025-68645

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-30 53.39% 47.55% -5.84%
2 2026-05-28 56.07% 53.39% -2.68%
3 2026-05-24 — 56.07% —

Full EPSS history (35 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-68645

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-68645

Affected software / configurations for CVE-2025-68645

Vendor Product Version Raw CPE
synacor zimbra_collaboration_suite >= 10.0.0, < 10.0.18 cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
synacor zimbra_collaboration_suite >= 10.1.0, < 10.1.13 cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

References for CVE-2025-68645

cvelogic Threat Intelligence