CVE-2025-66391

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

In Citrix Cloud through 2025-11-10, an account with read-only access can trigger the beginning of a workflow for write operations, e.g., the system will send a one-time password to an attacker-controlled email address when the attacker attempts to reset the password of a user account.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

CVE-2025-66391/Exploit.md at main · mandeepsohal/CVE-2025-66391 · GitHub

https://github.com/mandeepsohal/CVE-2025-66391/blob/main/Exploit.md

Vendor Advisories for CVE-2025-66391(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 47× 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 244 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-66391?
CVE-2025-66391 is a high vulnerability published on June 17, 2026. In Citrix Cloud through 2025-11-10, an account with read-only access can trigger the beginning of a workflow for write operations, e.g., the system will send a one-time password to an attacker-controlled email address when the attacker attempts to reset the password of a user account.
When was CVE-2025-66391 disclosed?
CVE-2025-66391 was first published in the National Vulnerability Database on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-66391 actively exploited?
CVE-2025-66391 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.1% of all scored CVEs.
What is the CVSS score of CVE-2025-66391?
CVE-2025-66391 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-66391?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-66391, 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

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