CVE-2026-3300

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-31. 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: 41%CVSS: 9.8Exploit: NoneExposed: 0

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

The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the "Complex Calculation" feature.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
98.5%
KEV
Not listed

Published

March 31, 2026

Last Modified

April 24, 2026

Advisory Details (1)

Auto-updated May 10, 2026
No patch confirmed yet.
generic

Changelog - Everest Forms

https://everestforms.net/changelog/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 27× 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 125 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • Nucleihttp/cves/2026/CVE-2026-3300.yaml
    First seen Jan 1, 2026

    Everest Forms Pro <= 1.9.12 - Unauthenticated RCE via Calculation Formula Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-3300?
CVE-2026-3300 is a critical vulnerability published on March 31, 2026. The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's processfilter() function concatenating user-submitted form field values into a PHP code string without proper…
When was CVE-2026-3300 disclosed?
CVE-2026-3300 was first published in the National Vulnerability Database on March 31, 2026, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3300 actively exploited?
CVE-2026-3300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-3300?
CVE-2026-3300 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-3300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3300, 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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