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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 39%CVSS: 9.8Exploit: Elevated riskExposed: 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)
EG Risk
75(Track)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation41% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
39%
EPSS %ILE
98%
KEV
Not listed

Published

March 31, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 31, 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 6× in last 7d / 65× 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 183 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 14:46 UTCEPSS rescore
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-20 22:55 UTCEPSS rescore
  10. 2026-08-19 17:03 UTCEPSS rescore
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 09:42 UTCEG score recompute
  15. 2026-08-16 09:42 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 23:16 UTCGHSA enrichment
  19. 2026-08-14 19:07 UTCGHSA enrichment
  20. 2026-08-14 14:25 UTCGHSA enrichment
  21. 2026-08-14 10:16 UTCGHSA enrichment
  22. 2026-08-14 06:06 UTCEG score recompute
  23. 2026-08-14 06:06 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 04:47 UTCGHSA enrichment
Show 75 more
  1. 2026-08-13 00:36 UTCGHSA enrichment
  2. 2026-08-12 20:27 UTCEG score recompute
  3. 2026-08-12 20:27 UTCGHSA enrichment
  4. 2026-08-12 13:51 UTCEPSS rescore
  5. 2026-08-12 00:48 UTCGHSA enrichment
  6. 2026-08-11 20:39 UTCEG score recompute
  7. 2026-08-11 20:39 UTCGHSA enrichment
  8. 2026-08-11 13:43 UTCEPSS rescore
  9. 2026-08-11 07:49 UTCGHSA enrichment
  10. 2026-08-11 03:39 UTCGHSA enrichment
  11. 2026-08-10 09:49 UTCGHSA enrichment
  12. 2026-08-10 05:40 UTCGHSA enrichment
  13. 2026-08-10 01:30 UTCGHSA enrichment
  14. 2026-08-09 21:20 UTCGHSA enrichment
  15. 2026-08-09 17:11 UTCGHSA enrichment
  16. 2026-08-09 13:02 UTCGHSA enrichment
  17. 2026-08-09 05:41 UTCEG score recompute
  18. 2026-08-09 05:41 UTCGHSA enrichment
  19. 2026-08-08 16:37 UTCEPSS rescore
  20. 2026-08-08 08:24 UTCGHSA enrichment
  21. 2026-08-08 04:15 UTCGHSA enrichment
  22. 2026-08-08 00:05 UTCGHSA enrichment
  23. 2026-08-07 19:56 UTCEG score recompute
  24. 2026-08-07 19:56 UTCGHSA enrichment
  25. 2026-08-07 15:47 UTCGHSA enrichment
  26. 2026-08-06 18:14 UTCEG score recompute
  27. 2026-08-06 18:14 UTCGHSA enrichment
  28. 2026-08-06 13:46 UTCEPSS rescore
  29. 2026-08-06 08:57 UTCGHSA enrichment
  30. 2026-08-06 04:48 UTCGHSA enrichment
  31. 2026-08-06 00:38 UTCEG score recompute
  32. 2026-08-06 00:38 UTCGHSA enrichment
  33. 2026-08-05 19:17 UTCEPSS rescore
  34. 2026-08-04 15:10 UTCEPSS rescore
  35. 2026-08-04 03:54 UTCGHSA enrichment
  36. 2026-08-03 22:58 UTCGHSA enrichment
  37. 2026-08-02 23:19 UTCGHSA enrichment
  38. 2026-08-02 19:10 UTCGHSA enrichment
  39. 2026-08-02 15:00 UTCEG score recompute
  40. 2026-08-02 15:00 UTCGHSA enrichment
  41. 2026-08-02 02:27 UTCEPSS rescore
  42. 2026-08-01 04:16 UTCEPSS rescore
  43. 2026-07-30 16:28 UTCEPSS rescore
  44. 2026-07-30 01:30 UTCEPSS rescore
  45. 2026-07-26 14:54 UTCEPSS rescore
  46. 2026-07-26 14:54 UTCEPSS rescore
  47. 2026-07-25 14:18 UTCEPSS rescore
  48. 2026-07-25 14:18 UTCEPSS rescore
  49. 2026-07-24 14:17 UTCEPSS rescore
  50. 2026-07-24 14:17 UTCEPSS rescore
  51. 2026-07-23 14:18 UTCEPSS rescore
  52. 2026-07-23 14:18 UTCEPSS rescore
  53. 2026-07-23 03:09 UTCEG score recompute
  54. 2026-07-22 14:08 UTCEPSS rescore
  55. 2026-07-21 15:24 UTCEPSS rescore
  56. 2026-07-20 17:08 UTCEPSS rescore
  57. 2026-07-19 02:29 UTCEPSS rescore
  58. 2026-07-18 10:04 UTCEPSS rescore
  59. 2026-07-16 17:03 UTCEPSS rescore
  60. 2026-07-15 16:57 UTCEPSS rescore
  61. 2026-07-15 16:57 UTCEPSS rescore
  62. 2026-07-13 22:30 UTCEPSS rescore
  63. 2026-07-13 06:13 UTCEPSS rescore
  64. 2026-07-13 06:13 UTCEPSS rescore
  65. 2026-07-12 05:46 UTCEPSS rescore
  66. 2026-07-11 08:27 UTCEPSS rescore
  67. 2026-07-09 19:10 UTCEPSS rescore
  68. 2026-07-06 16:27 UTCEPSS rescore
  69. 2026-07-06 16:27 UTCEPSS rescore
  70. 2026-07-05 02:30 UTCEPSS rescore
  71. 2026-07-01 15:06 UTCEPSS rescore
  72. 2026-06-29 14:06 UTCEPSS rescore
  73. 2026-06-28 14:07 UTCEPSS rescore
  74. 2026-06-28 04:56 UTCEPSS rescore
  75. 2026-06-27 03:08 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 June 17, 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 39% probability of exploitation in the next 30 days, which ranks it in the top 1.5% of all scored CVEs.
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

Explore the affected products and dependency analysis for CVE-2026-3300

Explore →

Is Your Infrastructure Affected by CVE-2026-3300?

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

Start Free Scan →Browse All CVEs