CVE-2026-42687

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

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: cna:patchstack, epss, ghsa
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
No patch confirmed yet.
generic

PHP Object Injection in WordPress EventPrime Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-2-1-php-object-injection-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-42687(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 / 91× 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 214 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42687?
CVE-2026-42687 is a high vulnerability published on June 15, 2026. Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.
When was CVE-2026-42687 disclosed?
CVE-2026-42687 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42687 actively exploited?
CVE-2026-42687 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 76.0% of all scored CVEs.
What is the CVSS score of CVE-2026-42687?
CVE-2026-42687 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-42687?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42687, 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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