CVE-2025-65318

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Elevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

When using the attachment interaction functionality, Canary Mail 5.1.40 and below saves documents to a file system without a Mark-of-the-Web tag, which allows attackers to bypass the built-in file protection mechanisms of both Windows OS and third-party software.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: 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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

December 16, 2025

Last Modified

July 5, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

GitHub - bbaboha/CVE-2025-65318-and-CVE-2025-65319: Insecure attachment handling when using Canary Mail or Blue mail · GitHub

https://github.com/bbaboha/CVE-2025-65318-and-CVE-2025-65319
generic

GitHub - nickvourd/RTI-Toolkit: Remote Template Injection Toolkit · GitHub

https://github.com/nickvourd/RTI-Toolkit
generic

demo_vuln.mp4 - Google Drive

https://drive.google.com/file/d/14wrTzvcLPfFsWmy-SAtDwwZKKPssBsx5/view
generic

canarymail.com - This website is for sale! - canary mail Resources and Information.

http://canarymail.com

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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 154 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCbbaboha/CVE-2025-65318-and-CVE-2025-65319
    First seen Dec 15, 2025

    Insecure attachment handling when using Canary Mail or Blue mail

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-65318?
CVE-2025-65318 is a critical vulnerability published on December 16, 2025. When using the attachment interaction functionality, Canary Mail 5.1.40 and below saves documents to a file system without a Mark-of-the-Web tag, which allows attackers to bypass the built-in file protection mechanisms of both Windows OS and third-party software.
When was CVE-2025-65318 disclosed?
CVE-2025-65318 was first published in the National Vulnerability Database on December 16, 2025, with the most recent update on July 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-65318 actively exploited?
CVE-2025-65318 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.6% of all scored CVEs.
What is the CVSS score of CVE-2025-65318?
CVE-2025-65318 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-65318?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-65318, 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.

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