CVE-2026-6279

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-21. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

The Avada Builder (fusion-builder) plugin for WordPress is vulnerable to Unauthenticated Remote Code Execution via PHP Function Injection in versions up to and including 3.15.2. This is due to the wp_conditional_tags case in Fusion_Builder_Conditional_Render_Helper::get_value() passing attacker-controlled values from a base64-decoded JSON blob directly to call_user_func() without any allowlist validation. This is exploitable by unauthenticated attackers through the fusion_get_widget_markup AJAX endpoint, which is registered for non-privileged (unauthenticated) users via wp_ajax_nopriv_fusion_get_widget_markup. The endpoint is protected only by a nonce (fusion_load_nonce), but this nonce is generated for user ID 0 and is deterministically exposed in the JavaScript output of any public-facing page containing a Post Cards ([fusion_post_cards]) or Table of Contents ([fusion_table_of_contents]) element. This makes it possible for unauthenticated attackers to execute arbitrary code on affected sites.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
80.2%
KEV
Not listed

Published

May 21, 2026

Last Modified

May 21, 2026

Advisory Details (1)

Auto-updated Jun 20, 2026
No patch confirmed yet.
generic

Avada Changelog – Avada Website Builder

https://avada.com/documentation/avada-changelog/

Vendor Advisories for CVE-2026-6279(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 11× in last 7d / 91× 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 284 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoC87achrafg-stack/CVE-2026-6279.py
    First seen Jun 13, 2026

    CVE-2026-6279

    Open source ↗
  • GitHub PoCzycoder0day/CVE-2026-6279
    First seen May 23, 2026

    CVE-2026-6279 — Avada Builder <= 3.15.2 Unauthenticated RCE via call_user_func()

    Open source ↗

Frequently asked(5)

What is CVE-2026-6279?
CVE-2026-6279 is a critical vulnerability published on May 21, 2026. The Avada Builder (fusion-builder) plugin for WordPress is vulnerable to Unauthenticated Remote Code Execution via PHP Function Injection in versions up to and including 3.15.2. This is due to the wpconditionaltags case in FusionBuilderConditionalRenderHelper::getvalue() passing attacker-controlled…
When was CVE-2026-6279 disclosed?
CVE-2026-6279 was first published in the National Vulnerability Database on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6279 actively exploited?
CVE-2026-6279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6279?
CVE-2026-6279 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-6279?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6279, 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-2026-6279

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