CVE-2026-56063

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

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

Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity83% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
No patch confirmed yet.
generic

Broken Access Control in WordPress MailChimp Block Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/block-for-mailchimp/vulnerability/wordpress-mailchimp-block-plugin-1-1-15-broken-access-control-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-56063(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 26× 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.

Showing the most recent 100 of 115 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56063?
CVE-2026-56063 is a high vulnerability published on June 26, 2026. Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.
When was CVE-2026-56063 disclosed?
CVE-2026-56063 was first published in the National Vulnerability Database on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56063 actively exploited?
CVE-2026-56063 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 93.1% of all scored CVEs.
What is the CVSS score of CVE-2026-56063?
CVE-2026-56063 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-56063?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56063, 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-2026-56063

Explore →

Is Your Infrastructure Affected by CVE-2026-56063?

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

Start Free Scan →Browse All CVEs