CVE-2026-8608

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-06. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: None knownExposed services: Not assessed

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

The Event Monster – Event Management, Events Calendar, Tickets plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in versions up to, and including, 2.1.0. This is due to the capture_payment() AJAX handler (registered via wp_ajax_nopriv_em_capture_payment) trusting client-supplied payment data — including transaction ID, amount, and payment status — without performing any server-side verification against the PayPal API or any other payment gateway, and without nonce or capability checks. This makes it possible for unauthenticated attackers to forge payment records, mark bookings as Completed, and obtain confirmation emails containing valid QR code tickets without making any actual payment.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

Published

June 5, 2026

Last Modified

July 23, 2026

References (5)

Vendor Advisories for CVE-2026-8608(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 7× in last 7d / 26× 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 96 of 207 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 111 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-09-14 04:59 UTCEG score recompute
  24. 2026-09-14 04:59 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  25. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
Show 71 more
  1. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-08-30 19:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-08-25 01:48 UTCEG score recompute
  17. 2026-08-25 01:48 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  18. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-08-23 12:22 UTCEG score recompute
  20. 2026-08-23 12:22 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  21. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-08-21 12:44 UTCEG score recompute
  23. 2026-08-21 12:44 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  24. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-08-20 09:36 UTCEG score recompute
  26. 2026-08-20 09:36 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  27. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  28. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-08-17 02:10 UTCEG score recompute
  31. 2026-08-17 02:10 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  32. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  33. 2026-08-16 02:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-08-16 01:38 UTCEG score recompute
  35. 2026-08-16 01:38 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  36. 2026-08-15 01:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-08-14 22:26 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  38. 2026-08-13 22:30 UTCEG score recompute
  39. 2026-08-13 22:30 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  40. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  41. 2026-08-12 21:33 UTCEG score recompute
  42. 2026-08-12 21:33 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  43. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-08-11 21:36 UTCEG score recompute
  45. 2026-08-11 21:36 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  46. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  47. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  48. 2026-08-10 21:40 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  49. 2026-08-09 20:06 UTCEG score recompute
  50. 2026-08-09 20:06 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  51. 2026-08-09 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-08-08 20:10 UTCEG score recompute
  53. 2026-08-08 20:10 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  54. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  55. 2026-08-07 20:11 UTCEG score recompute
  56. 2026-08-07 20:11 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  57. 2026-08-07 16:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  58. 2026-08-06 20:15 UTCEG score recompute
  59. 2026-08-06 20:15 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  60. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  61. 2026-08-05 20:18 UTCEG score recompute
  62. 2026-08-05 20:18 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  63. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  64. 2026-08-04 17:15 UTCEG score recompute
  65. 2026-08-04 17:15 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  66. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  67. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  68. 2026-08-03 15:24 UTCEG score recompute
  69. 2026-08-03 15:24 UTCGHSA enrichmentGHSA-5vph-83m8-9635 · GitHub CVSS 5.3
  70. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  71. 2026-08-02 11:03 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8608?
CVE-2026-8608 is a medium vulnerability published on June 5, 2026. The Event Monster – Event Management, Events Calendar, Tickets plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in versions up to, and including, 2.1.0. This is due to the capturepayment() AJAX handler (registered via wpajaxnoprivemcapturepayment) trusting…
When was the CVE record for CVE-2026-8608 published?
The CVE record for CVE-2026-8608 was published on June 5, 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 July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-8608 actively exploited?
CVE-2026-8608 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8608?
CVE-2026-8608 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-8608?
No fix for CVE-2026-8608 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-8608 are linked in the Vendor Advisories panel on this page.

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