CVE-2026-39587

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. The CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: None knownExposed services: Not assessed

Update the WordPress WP BASE Booking Plugin to the latest available version (at least 6.0.0) (from the CVE record's solution, Patchstack) — apply it.

Unauthenticated Privilege Escalation in WP BASE Booking <= 5.9.0 versions.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: Update the WordPress WP BASE Booking Plugin to the latest available version (at least 6.0.0) (from the CVE record's solution, Patchstack). Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

Update the WordPress WP BASE Booking Plugin to the latest available version (at least 6.0.0) (from the CVE record's solution, Patchstack). Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
Fix named in the CVE record's solution (Patchstack).
Web page

Privilege Escalation in WordPress WP BASE Booking Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/wp-base-booking-of-appointments-services-and-events/vulnerability/wordpress-wp-base-booking-plugin-5-9-0-privilege-escalation-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-39587(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 / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 256 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 157 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:52 UTCEG score recompute
  2. 2026-10-11 17:05 UTCEG score recompute
  3. 2026-10-11 14:32 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-09-14 03:39 UTCEG score recompute
Show 74 more
  1. 2026-09-14 03:39 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  2. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-08-30 22:56 UTCEG score recompute
  15. 2026-08-30 22:56 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  16. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-08-24 23:31 UTCEG score recompute
  23. 2026-08-24 23:31 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  24. 2026-08-23 22:27 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  25. 2026-08-23 09:42 UTCEG score recompute
  26. 2026-08-23 09:42 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  27. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  28. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  29. 2026-08-21 22:41 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  30. 2026-08-21 09:52 UTCEG score recompute
  31. 2026-08-21 09:52 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  32. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  33. 2026-08-20 21:06 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  34. 2026-08-20 08:39 UTCEG score recompute
  35. 2026-08-20 08:39 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  36. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  37. 2026-08-19 13:12 UTCEG score recompute
  38. 2026-08-19 13:12 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  39. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  40. 2026-08-17 15:15 UTCEG score recompute
  41. 2026-08-17 15:15 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  42. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  43. 2026-08-17 02:53 UTCEG score recompute
  44. 2026-08-17 02:53 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  45. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  46. 2026-08-16 14:34 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  47. 2026-08-16 02:15 UTCEG score recompute
  48. 2026-08-16 02:15 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  49. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  50. 2026-08-15 13:57 UTCEG score recompute
  51. 2026-08-15 13:57 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  53. 2026-08-15 01:21 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  54. 2026-08-14 13:02 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  55. 2026-08-14 00:43 UTCEG score recompute
  56. 2026-08-14 00:43 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  57. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  58. 2026-08-13 12:24 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  59. 2026-08-13 00:05 UTCEG score recompute
  60. 2026-08-13 00:05 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  61. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  62. 2026-08-12 11:47 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  63. 2026-08-11 23:28 UTCEG score recompute
  64. 2026-08-11 23:28 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  65. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  66. 2026-08-11 11:09 UTCEG score recompute
  67. 2026-08-11 11:09 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  68. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  69. 2026-08-10 22:50 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  70. 2026-08-10 10:29 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  71. 2026-08-09 22:10 UTCEG score recompute
  72. 2026-08-09 22:10 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1
  73. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  74. 2026-08-09 09:51 UTCGHSA enrichmentGHSA-23mx-4w8p-jgwp · GitHub severity HIGH · GitHub CVSS 8.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39587?
CVE-2026-39587 is a high-severity vulnerability; its CVE record was published on June 15, 2026. Unauthenticated Privilege Escalation in WP BASE Booking <= 5.9.0 versions.
When was the CVE record for CVE-2026-39587 published?
The CVE record for CVE-2026-39587 was published on June 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 16, 2026; the record at its source may have been updated since.
Is CVE-2026-39587 actively exploited?
CVE-2026-39587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-39587?
CVE-2026-39587 has a CVSS base score of 8.1 (the CNA's own assessment, by patchstack; NVD's own analysis pending).
How do I remediate CVE-2026-39587?
The CVE record's solution for CVE-2026-39587, written by its CNA Patchstack, names the fix: "Update the WordPress WP BASE Booking Plugin to the latest available version (at least 6.0.0)." The vendor advisories EchelonGraph has for CVE-2026-39587 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-39587

Explore →

Is Your Infrastructure Affected by CVE-2026-39587?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs