CVE-2025-66391

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH 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
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 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(high)
EPSS
30.3%
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 35× in last 7d / 104× 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 104 total refreshes for this CVE.

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

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 30.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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