How severe is CVE-2025-68645?

CVE-2025-68645 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-68645?

Affected package information for CVE-2025-68645 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2025-68645?

No fixed version has been published for CVE-2025-68645 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2025-68645 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2025-68645, including . All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2025-68645?

CVE-2025-68645 has an EPSS (Exploit Prediction Scoring System) score of 47.6%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2025-68645 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-68645 (Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-01-22. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-02-12. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Is there exploit tooling available for CVE-2025-68645?

A Nuclei detection template exists for CVE-2025-68645, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2025-68645 published, and has it been updated?

CVE-2025-68645 was published on December 22, 2025 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2025-68645: high severity vulnerability (CVSS 8.8)

EPSS Exploitation Probability

via FIRST.org ↗

47.6%probability of exploitation in next 30 days

High Risk98th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2025-68645 in your stack?

O3 detects CVE-2025-68645 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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