CVE-2025-68645
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.
do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Can a WAF block it? Partly. Cloudflare publishes WAF a rule written for this CVE. Such rules block the known exploit requests and buy time, but attackers can change the request to get past them, so they do not replace the patch.
Cloudflare · 1 rule (Block) · since 16 Feb 2026
- Zimbra - Local File Inclusion - CVE:CVE-2025-68645 · Cloudflare Managed Ruleset
Also consider: patch · enable the vendor rule in block mode
Based on WAF vendor rules published for this CVE. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2025-68645 being exploited?
Yes. CVE-2025-68645 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2025-68645?
CVE-2025-68645 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-68645?
Yes. A fix has been recorded for CVE-2025-68645. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-68645 affect?
CVE-2025-68645 affects synacor:zimbra_collaboration_suite. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
public exploits
Unvetted proof-of-concept code on GitHub: 7 GitHub proofs of concept · 1 Nuclei template
- Zimbra Collaboration - Local File Inclusion · detection template · high
- MaxMnMl/zimbramail-CVE-2025-68645-poc · 3 ★
- codeb0ssx/CVE-2025-68645-PoC · 2 ★
- 0xBlackash/CVE-2025-68645 · 2 ★
- HarisAidhin/Poc_CVE-2025-68645 · 1 ★
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- no
- technical impact
- total
Assessed by CISA 23 Jan 2026 (SSVC 2.0.3).
timeline
- 22 Dec 2025Published
- 30 Dec 2025First proof-of-concept repository on GitHub (unvetted) · 7 days later
- 22 Jan 2026Added to CISA KEV (exploited in the wild) · 23 days later
- 23 Jan 2026CISA SSVC assessment: exploitation active · 1 day later
- 12 Feb 2026CISA remediation due date (US federal agencies) · 20 days later
- 26 Feb 2026CVE record last updated · 15 days later
- 2 Nov 2026Analysed by vulneraibility.com · 249 days (about 8 months) later
- Linkwiki.zimbra.com /wiki/Security_Center
- Linkwiki.zimbra.com /wiki/Zimbra_Responsible_Disclosure_Policy
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Nuclei templates: detection templates
- PoC-in-GitHub: GitHub repositories that claim a proof of concept
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.