CVE-2026-9055

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-02. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

The Booking for Appointments and Events Calendar – Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled 'type' parameter in the customer update endpoint, which allows customers to set their role to 'manager' and trigger creation of a WordPress user with the wpamelia-manager role when the 'externalId' parameter is set to 0. This makes it possible for unauthenticated attackers to escalate their privileges to administrator by first elevating to the manager role, then creating a provider entity linked to an administrator user ID and overwriting that administrator's password.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 2, 2026

Advisory Details (1)

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

Changelog - Amelia WordPress Booking Plugin

https://wpamelia.com/documentation/changelog/

Vendor Advisories for CVE-2026-9055(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 53× in last 7d / 141× 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 141 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9055?
CVE-2026-9055 is a critical vulnerability published on September 2, 2026. The Booking for Appointments and Events Calendar – Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled 'type' parameter in the customer update endpoint, which allows customers to set…
When was CVE-2026-9055 disclosed?
CVE-2026-9055 was first published in the National Vulnerability Database on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9055 actively exploited?
CVE-2026-9055 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 78.1% of all scored CVEs.
What is the CVSS score of CVE-2026-9055?
CVE-2026-9055 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-9055?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9055, 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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