CVE-2026-8599

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-06-09. the CNA's CVSS baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:wordfence, epss, ghsa
Trending — 3 sources updated this week
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0

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

The MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Campaign HTML Content Field in all versions up to, and including, 2.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The public-facing campaign preview endpoint (/mp-email/{id}-slug/) is not affected by this vulnerability, as it applies a Content-Security-Policy header blocking all inline scripts; exploitation is limited to the admin dashboard preview.

CVSS v3
6.4
EG Score
6.4(high)
EPSS
14.2%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 9, 2026

References (11)

Vendor Advisories for CVE-2026-8599(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 20× in last 7d / 89× 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.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 15:49 UTCEG score recompute
  6. 2026-07-05 15:49 UTCGHSA enrichment
  7. 2026-07-05 02:31 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 14:27 UTCEG score recompute
  10. 2026-07-04 14:27 UTCGHSA enrichment
  11. 2026-07-03 09:05 UTCEG score recompute
  12. 2026-07-03 09:05 UTCGHSA enrichment
  13. 2026-07-02 11:22 UTCEG score recompute
  14. 2026-07-02 11:22 UTCGHSA enrichment
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-07-01 13:25 UTCEG score recompute
  17. 2026-07-01 13:25 UTCGHSA enrichment
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 15:40 UTCEG score recompute
  20. 2026-06-30 15:40 UTCGHSA enrichment
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 12:07 UTCEG score recompute
  23. 2026-06-29 12:07 UTCGHSA enrichment
  24. 2026-06-28 14:26 UTCEG score recompute
  25. 2026-06-28 14:26 UTCGHSA enrichment
Show 64 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 16:41 UTCEG score recompute
  4. 2026-06-27 16:41 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-26 19:01 UTCEG score recompute
  7. 2026-06-26 19:01 UTCGHSA enrichment
  8. 2026-06-25 21:20 UTCEG score recompute
  9. 2026-06-25 21:20 UTCGHSA enrichment
  10. 2026-06-25 13:50 UTCEPSS rescore
  11. 2026-06-24 23:40 UTCEG score recompute
  12. 2026-06-24 23:39 UTCGHSA enrichment
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-24 01:56 UTCEG score recompute
  15. 2026-06-24 01:56 UTCGHSA enrichment
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-23 04:15 UTCEG score recompute
  18. 2026-06-23 04:14 UTCGHSA enrichment
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-22 05:24 UTCEG score recompute
  21. 2026-06-22 05:24 UTCGHSA enrichment
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 05:32 UTCEG score recompute
  24. 2026-06-21 05:32 UTCGHSA enrichment
  25. 2026-06-21 01:59 UTCEPSS rescore
  26. 2026-06-20 07:48 UTCEG score recompute
  27. 2026-06-20 07:48 UTCGHSA enrichment
  28. 2026-06-19 19:26 UTCEPSS rescore
  29. 2026-06-19 09:46 UTCEG score recompute
  30. 2026-06-19 09:46 UTCGHSA enrichment
  31. 2026-06-18 17:52 UTCEPSS rescore
  32. 2026-06-18 09:40 UTCEG score recompute
  33. 2026-06-18 09:40 UTCGHSA enrichment
  34. 2026-06-17 17:53 UTCEPSS rescore
  35. 2026-06-17 11:50 UTCEG score recompute
  36. 2026-06-17 11:50 UTCGHSA enrichment
  37. 2026-06-16 17:53 UTCEPSS rescore
  38. 2026-06-16 14:10 UTCEG score recompute
  39. 2026-06-16 14:10 UTCGHSA enrichment
  40. 2026-06-15 17:49 UTCEPSS rescore
  41. 2026-06-15 17:49 UTCEPSS rescore
  42. 2026-06-15 16:29 UTCEG score recompute
  43. 2026-06-15 16:29 UTCGHSA enrichment
  44. 2026-06-14 23:18 UTCEPSS rescore
  45. 2026-06-14 18:49 UTCEG score recompute
  46. 2026-06-14 18:49 UTCGHSA enrichment
  47. 2026-06-13 23:00 UTCEPSS rescore
  48. 2026-06-13 21:08 UTCEG score recompute
  49. 2026-06-13 21:08 UTCGHSA enrichment
  50. 2026-06-12 23:27 UTCEG score recompute
  51. 2026-06-12 23:27 UTCGHSA enrichment
  52. 2026-06-12 23:12 UTCEPSS rescore
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-12 01:46 UTCEG score recompute
  55. 2026-06-12 01:46 UTCGHSA enrichment
  56. 2026-06-11 14:00 UTCEPSS rescore
  57. 2026-06-11 04:06 UTCEG score recompute
  58. 2026-06-11 04:06 UTCGHSA enrichment
  59. 2026-06-10 22:19 UTCEPSS rescore
  60. 2026-06-10 13:22 UTCEPSS rescore
  61. 2026-06-10 06:26 UTCEG score recompute
  62. 2026-06-10 06:26 UTCGHSA enrichment
  63. 2026-06-09 08:46 UTCEG score recompute
  64. 2026-06-09 08:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8599?
CVE-2026-8599 is a medium vulnerability published on June 9, 2026. The MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Campaign HTML Content Field in all versions up to, and including, 2.0.4 due to insufficient input sanitization and output escaping. This makes…
When was CVE-2026-8599 disclosed?
CVE-2026-8599 was first published in the National Vulnerability Database on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8599 actively exploited?
CVE-2026-8599 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8599?
CVE-2026-8599 has a CVSS v4.0 base score of 6.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-8599?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8599, 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

Explore the affected products and dependency analysis for CVE-2026-8599

Explore →

Is Your Infrastructure Affected by CVE-2026-8599?

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

Start Free Scan →Browse All CVEs