CVE-2026-3891

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 25%CVSS: 9.8Exploit: Metasploit · epss top5pct · public exploitExposed: 0

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

The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing capability check and missing file type validation in the 'lkn_pix_for_woocommerce_c6_save_settings' function in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Track)
EG Risk 85/100SSVC: 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%
Exploitation65% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
25%
EPSS %ILE
98%
KEV
Not listed

Published

March 13, 2026

Last Modified

June 17, 2026

References (3)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 23× 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 211 total refreshes for this CVE.

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

Publicly available exploits

(10 references)

Working exploit code is in the public domain (1 Metasploit module) (7 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52642
    First seen Aug 17, 2026

    WooCommerce 1.5.0 - Unauthenticated Arbitrary File Upload

    Open source ↗
  • GitHub PoCCh4120N/CVE-2026-3891
    First seen Aug 3, 2026

    PoC for CVE-2026-3891 – Unauthenticated File Upload RCE in Pix for WooCommerce ≤ 1.5.0. Automated nonce retrieval, PHP upload, and command execution.

    Open source ↗
  • GitHub PoCm4sh-wacker/CVE-2026-3891-Pix-for-WooCommerce-Plugin-Exploit
    First seen Jul 15, 2026

    PoC for CVE-2026-3891 — Unauthenticated Arbitrary File Upload leading to Remote Code Execution in Pix for WooCommerce <= 1.5.0

    Open source ↗
  • GitHub PoCshinthink/CVE-2026-3891
    First seen Jul 15, 2026

    Pix for WooCommerce Unauthenticated File Upload via certificate_crt_path Parameter | CVSS 9.8

    Open source ↗
  • GitHub PoCwillygailo/CVE-2026-3891-Linux
    First seen May 31, 2026

    ⚡ This tool exploits CVE-2026-3891, a critical unauthenticated arbitrary file upload vulnerability found in the Pix for WooCommerce WordPress plugin (versions ≤ 1.5.0).

    Open source ↗
  • GitHub PoCAnggaTechI/Mass-Scanner-CVE-2026-3891
    First seen Apr 16, 2026

    CVE-2026-3891 Mass Scanning

    Open source ↗
  • GitHub PoCNxploited/CVE-2026-3891
    First seen Mar 27, 2026

    Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

    Open source ↗
  • GitHub PoCjoshuavanderpoll/CVE-2026-3891
    First seen Mar 13, 2026

    Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload (CVE-2026-3891) PoC

    Open source ↗
  • Metasploitexploit/multi/http/wp_plugin_pix_unauth_rce_cve_2026_3891✓ verified
    First seen Mar 12, 2026

    WordPress Unauthenticated RCE via Pix for WooCommerce plugin

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-3891.yaml
    First seen Jan 1, 2026

    Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-3891?
CVE-2026-3891 is a critical vulnerability published on March 13, 2026. The Pix for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing capability check and missing file type validation in the 'lknpixforwoocommercec6savesettings' function in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated…
When was CVE-2026-3891 disclosed?
CVE-2026-3891 was first published in the National Vulnerability Database on March 13, 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-2026-3891 actively exploited?
CVE-2026-3891 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25% probability of exploitation in the next 30 days, which ranks it in the top 2.2% of all scored CVEs.
What is the CVSS score of CVE-2026-3891?
CVE-2026-3891 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-3891?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3891, 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-2026-3891

Explore →

Is Your Infrastructure Affected by CVE-2026-3891?

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

Start Free Scan →Browse All CVEs