CVE-2026-6566

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

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

The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 4.2.0. This is due to insufficient object-level authorization in the image deletion REST flow where the permission callback for DELETE /imagely/v1/images/{id} only checks 'NextGEN Manage gallery' permissions and does not enforce gallery ownership or 'NextGEN Manage others gallery' permissions. This makes it possible for authenticated attackers, with Subscriber-level privileges and 'NextGEN Manage gallery' capability, to delete gallery images belonging to other users as well as their associated image files from disk when deleteImg is enabled (default).

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
17.9%
KEV
Not listed

Published

May 20, 2026

Last Modified

May 20, 2026

References (2)

Vendor Advisories for CVE-2026-6566(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 13× in last 7d / 63× 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 116 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6566?
CVE-2026-6566 is a medium vulnerability published on May 20, 2026. The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 4.2.0. This is due to insufficient object-level authorization in the image deletion REST flow where the permission callback for…
When was CVE-2026-6566 disclosed?
CVE-2026-6566 was first published in the National Vulnerability Database on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6566 actively exploited?
CVE-2026-6566 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6566?
CVE-2026-6566 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-6566?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6566, 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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