CVE-2026-15420

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-07-24. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

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

The Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.0.0 via the 'plus_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary JS/CSS files on the server, which can lead to denial of service or destruction of critical plugin and theme assets.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

July 24, 2026

Last Modified

July 24, 2026

References (10)

Vendor Advisories for CVE-2026-15420(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 17× in last 7d / 79× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:27 UTCEG score recompute
  3. 2026-08-30 00:27 UTCGHSA enrichment
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 21:07 UTCEG score recompute
  6. 2026-08-27 21:07 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:49 UTCEG score recompute
  9. 2026-08-26 14:49 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 13:48 UTCEPSS rescore
  12. 2026-08-25 12:46 UTCEG score recompute
  13. 2026-08-25 12:46 UTCGHSA enrichment
  14. 2026-08-24 10:40 UTCEG score recompute
  15. 2026-08-24 10:40 UTCGHSA enrichment
  16. 2026-08-23 08:37 UTCEG score recompute
  17. 2026-08-23 08:37 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 06:34 UTCEG score recompute
  20. 2026-08-22 06:34 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 04:31 UTCEG score recompute
  23. 2026-08-21 04:31 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 02:28 UTCEG score recompute
Show 74 more
  1. 2026-08-20 02:28 UTCGHSA enrichment
  2. 2026-08-19 17:03 UTCEPSS rescore
  3. 2026-08-19 00:25 UTCEG score recompute
  4. 2026-08-19 00:24 UTCGHSA enrichment
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-17 22:19 UTCEG score recompute
  7. 2026-08-17 22:19 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 20:16 UTCEG score recompute
  10. 2026-08-16 20:16 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-15 18:13 UTCEG score recompute
  14. 2026-08-15 18:13 UTCGHSA enrichment
  15. 2026-08-15 01:30 UTCEPSS rescore
  16. 2026-08-14 16:09 UTCEG score recompute
  17. 2026-08-14 16:09 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 14:06 UTCEG score recompute
  20. 2026-08-13 14:06 UTCGHSA enrichment
  21. 2026-08-12 13:50 UTCEPSS rescore
  22. 2026-08-12 12:03 UTCEG score recompute
  23. 2026-08-12 12:03 UTCGHSA enrichment
  24. 2026-08-11 13:42 UTCEPSS rescore
  25. 2026-08-11 09:59 UTCEG score recompute
  26. 2026-08-11 09:59 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 07:56 UTCEG score recompute
  29. 2026-08-10 07:56 UTCGHSA enrichment
  30. 2026-08-09 13:46 UTCEPSS rescore
  31. 2026-08-09 05:53 UTCEG score recompute
  32. 2026-08-09 05:53 UTCGHSA enrichment
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-08 03:50 UTCEG score recompute
  35. 2026-08-08 03:50 UTCGHSA enrichment
  36. 2026-08-07 01:47 UTCEG score recompute
  37. 2026-08-07 01:47 UTCGHSA enrichment
  38. 2026-08-06 13:46 UTCEPSS rescore
  39. 2026-08-05 23:44 UTCGHSA enrichment
  40. 2026-08-04 21:41 UTCEG score recompute
  41. 2026-08-04 21:41 UTCGHSA enrichment
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 10:38 UTCEPSS rescore
  44. 2026-08-03 19:36 UTCEG score recompute
  45. 2026-08-03 19:36 UTCGHSA enrichment
  46. 2026-08-03 10:35 UTCEPSS rescore
  47. 2026-08-02 17:33 UTCEG score recompute
  48. 2026-08-02 17:33 UTCGHSA enrichment
  49. 2026-08-02 02:26 UTCEPSS rescore
  50. 2026-08-01 15:29 UTCEG score recompute
  51. 2026-08-01 15:29 UTCGHSA enrichment
  52. 2026-08-01 04:15 UTCEPSS rescore
  53. 2026-07-31 13:26 UTCEG score recompute
  54. 2026-07-31 13:26 UTCGHSA enrichment
  55. 2026-07-30 16:27 UTCEPSS rescore
  56. 2026-07-30 11:20 UTCEG score recompute
  57. 2026-07-30 11:20 UTCGHSA enrichment
  58. 2026-07-30 01:30 UTCEPSS rescore
  59. 2026-07-29 09:16 UTCEG score recompute
  60. 2026-07-29 09:16 UTCGHSA enrichment
  61. 2026-07-28 15:36 UTCEPSS rescore
  62. 2026-07-28 07:12 UTCEG score recompute
  63. 2026-07-28 07:12 UTCGHSA enrichment
  64. 2026-07-27 14:13 UTCEPSS rescore
  65. 2026-07-27 05:08 UTCEG score recompute
  66. 2026-07-27 05:08 UTCGHSA enrichment
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-26 03:04 UTCEG score recompute
  70. 2026-07-26 03:04 UTCGHSA enrichment
  71. 2026-07-25 14:17 UTCEPSS rescore
  72. 2026-07-24 14:17 UTCEPSS rescore
  73. 2026-07-24 03:33 UTCEG score recompute
  74. 2026-07-24 03:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15420?
CVE-2026-15420 is a medium vulnerability published on July 24, 2026. The Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.0.0 via the 'plus_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to…
When was CVE-2026-15420 disclosed?
CVE-2026-15420 was first published in the National Vulnerability Database on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15420 actively exploited?
CVE-2026-15420 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.6% of all scored CVEs.
What is the CVSS score of CVE-2026-15420?
CVE-2026-15420 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-15420?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15420, 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

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