CVE-2025-68645

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-01-22), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 49%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
49%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

December 22, 2025

Last Modified

January 23, 2026

Advisory Details (3)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645
generic

Zimbra Responsible Disclosure Policy - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
generic🔴 Active Exploitation

Security Center - Zimbra :: Tech Center

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 60× in last 7d / 257× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 927 total refreshes for this CVE.

  1. 2026-09-20 00:57 UTCGHSA enrichment
  2. 2026-09-19 21:13 UTCGHSA enrichment
  3. 2026-09-19 17:29 UTCEG score recompute
  4. 2026-09-19 17:29 UTCGHSA enrichment
  5. 2026-09-19 13:45 UTCGHSA enrichment
  6. 2026-09-19 10:01 UTCGHSA enrichment
  7. 2026-09-19 06:18 UTCGHSA enrichment
  8. 2026-09-19 02:34 UTCGHSA enrichment
  9. 2026-09-18 22:49 UTCEG score recompute
  10. 2026-09-18 22:49 UTCGHSA enrichment
  11. 2026-09-18 19:27 UTCEPSS rescore
  12. 2026-09-18 19:20 UTCCISA KEV update
  13. 2026-09-18 19:06 UTCGHSA enrichment
  14. 2026-09-18 15:22 UTCGHSA enrichment
  15. 2026-09-18 14:15 UTCCISA KEV update
  16. 2026-09-18 11:38 UTCGHSA enrichment
  17. 2026-09-18 07:54 UTCGHSA enrichment
  18. 2026-09-18 04:10 UTCGHSA enrichment
  19. 2026-09-18 00:26 UTCGHSA enrichment
  20. 2026-09-17 20:41 UTCEG score recompute
  21. 2026-09-17 20:41 UTCGHSA enrichment
  22. 2026-09-17 19:30 UTCEPSS rescore
  23. 2026-09-17 16:56 UTCGHSA enrichment
  24. 2026-09-17 12:47 UTCGHSA enrichment
  25. 2026-09-17 09:00 UTCGHSA enrichment
Show 75 more
  1. 2026-09-17 05:16 UTCGHSA enrichment
  2. 2026-09-17 01:32 UTCGHSA enrichment
  3. 2026-09-16 21:47 UTCGHSA enrichment
  4. 2026-09-16 18:02 UTCGHSA enrichment
  5. 2026-09-16 14:19 UTCEG score recompute
  6. 2026-09-16 14:19 UTCGHSA enrichment
  7. 2026-09-16 14:10 UTCCISA KEV update
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 10:34 UTCGHSA enrichment
  10. 2026-09-16 06:48 UTCEG score recompute
  11. 2026-09-16 06:48 UTCGHSA enrichment
  12. 2026-09-16 05:14 UTCEPSS rescore
  13. 2026-09-16 03:04 UTCGHSA enrichment
  14. 2026-09-15 23:20 UTCGHSA enrichment
  15. 2026-09-15 19:36 UTCGHSA enrichment
  16. 2026-09-15 15:52 UTCGHSA enrichment
  17. 2026-09-15 12:08 UTCGHSA enrichment
  18. 2026-09-15 08:24 UTCGHSA enrichment
  19. 2026-09-15 04:40 UTCEG score recompute
  20. 2026-09-15 04:39 UTCGHSA enrichment
  21. 2026-09-15 03:10 UTCEPSS rescore
  22. 2026-09-15 00:55 UTCGHSA enrichment
  23. 2026-09-14 21:11 UTCGHSA enrichment
  24. 2026-09-14 19:24 UTCCISA KEV update
  25. 2026-09-14 17:27 UTCGHSA enrichment
  26. 2026-09-14 13:43 UTCGHSA enrichment
  27. 2026-09-14 09:58 UTCGHSA enrichment
  28. 2026-09-14 06:14 UTCGHSA enrichment
  29. 2026-09-14 02:30 UTCGHSA enrichment
  30. 2026-09-13 22:46 UTCGHSA enrichment
  31. 2026-09-13 19:02 UTCGHSA enrichment
  32. 2026-09-13 15:18 UTCGHSA enrichment
  33. 2026-09-13 11:34 UTCGHSA enrichment
  34. 2026-09-13 07:50 UTCGHSA enrichment
  35. 2026-09-13 04:06 UTCGHSA enrichment
  36. 2026-09-13 00:22 UTCGHSA enrichment
  37. 2026-09-12 20:38 UTCGHSA enrichment
  38. 2026-09-12 16:54 UTCEG score recompute
  39. 2026-09-12 16:54 UTCGHSA enrichment
  40. 2026-09-12 15:00 UTCEPSS rescore
  41. 2026-09-12 13:10 UTCGHSA enrichment
  42. 2026-09-12 09:26 UTCGHSA enrichment
  43. 2026-09-12 05:42 UTCGHSA enrichment
  44. 2026-09-12 01:58 UTCGHSA enrichment
  45. 2026-09-11 22:14 UTCGHSA enrichment
  46. 2026-09-11 18:49 UTCCISA KEV update
  47. 2026-09-11 18:30 UTCEG score recompute
  48. 2026-09-11 18:30 UTCGHSA enrichment
  49. 2026-09-11 14:52 UTCEPSS rescore
  50. 2026-09-11 14:46 UTCGHSA enrichment
  51. 2026-09-11 11:02 UTCEG score recompute
  52. 2026-09-11 11:02 UTCGHSA enrichment
  53. 2026-09-11 09:36 UTCEPSS rescore
  54. 2026-09-11 07:18 UTCGHSA enrichment
  55. 2026-09-11 03:34 UTCGHSA enrichment
  56. 2026-09-10 23:49 UTCGHSA enrichment
  57. 2026-09-10 20:05 UTCGHSA enrichment
  58. 2026-09-10 19:28 UTCCISA KEV update
  59. 2026-09-10 16:20 UTCGHSA enrichment
  60. 2026-09-10 12:36 UTCEG score recompute
  61. 2026-09-10 12:36 UTCGHSA enrichment
  62. 2026-09-10 09:34 UTCEPSS rescore
  63. 2026-09-10 08:51 UTCGHSA enrichment
  64. 2026-09-10 05:07 UTCGHSA enrichment
  65. 2026-09-10 01:23 UTCGHSA enrichment
  66. 2026-09-09 21:39 UTCGHSA enrichment
  67. 2026-09-09 19:08 UTCCISA KEV update
  68. 2026-09-09 17:55 UTCGHSA enrichment
  69. 2026-09-09 14:11 UTCGHSA enrichment
  70. 2026-09-09 10:27 UTCGHSA enrichment
  71. 2026-09-09 06:42 UTCGHSA enrichment
  72. 2026-09-09 02:58 UTCGHSA enrichment
  73. 2026-09-08 23:14 UTCEG score recompute
  74. 2026-09-08 23:14 UTCGHSA enrichment
  75. 2026-09-08 22:00 UTCEPSS rescore

Publicly available exploits

(5 references)

Working exploit code is in the public domain (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC0xBlackash/CVE-2025-68645
    First seen Apr 24, 2026

    CVE-2025-68645

    Open source ↗
  • GitHub PoCMaxMnMl/zimbramail-CVE-2025-68645-poc
    First seen Jan 1, 2026

    CVE-2025-68645 - A Local File Inclusion (LFI) vulnerability in the Webmail Classic UI of Zimbra Collaboration

    Open source ↗
  • GitHub PoCchinaxploiter/CVE-2025-68645-PoC
    First seen Dec 30, 2025

    Academic proof-of-concept demonstrating CVE-2025-68645 for authorized security research.

    Open source ↗
  • GitHub PoCcodeb0ssx/CVE-2025-68645-PoC
    First seen Dec 30, 2025

    Academic proof-of-concept demonstrating CVE-2025-68645 for authorized security research.

    Open source ↗
  • Nucleihttp/cves/2025/CVE-2025-68645.yaml
    First seen Jan 1, 2025

    Zimbra Collaboration - Local File Inclusion

    Open source ↗

Frequently asked(6)

What is CVE-2025-68645?
CVE-2025-68645 is a critical vulnerability published on December 22, 2025. 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…
When was CVE-2025-68645 disclosed?
CVE-2025-68645 was first published in the National Vulnerability Database on December 22, 2025, with the most recent update on January 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-68645 actively exploited?
Yes. CISA added CVE-2025-68645 to the Known Exploited Vulnerabilities catalog on January 22, 2026, affecting Synacor Zimbra Collaboration Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-68645?
CVE-2025-68645 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2025-68645?
CVE-2025-68645 affects Synacor Zimbra Collaboration Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2025-68645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-68645, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-68645

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