CVE-2026-3891 in the critical feed json
Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload
published 7mo ago modified 4mo ago also EUVD-2026-11760
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 34.3%
- EPSS 34.3% chance of exploitation in 30 days, percentile 98%
- public exploits
- 2
- Metasploit and Exploit-DB, plus a Nuclei check
Summary
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.
Is CVE-2026-3891 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerTimeline
- First public exploit (Metasploit exploit/multi/http/wp_plugin_pix_unauth_rce_cve_2026_3891)
- Published
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 7mo ago
Exploit prediction
34.33% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit exploit/multi/http/wp_plugin_pix_unauth_rce_cve_2026_3891 WordPress Unauthenticated RCE via Pix for WooCommerce plugin metasploit exploit, excellent rank, 2026-03-12
- EDB-52642 WooCommerce 1.5.0 - Unauthenticated Arbitrary File Upload webapps, 2026-08-17
- Nuclei template Pix for WooCommerce <= 1.5.0 - Unauthenticated Arbitrary File Upload nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- linknacional Pix for WooCommerce
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/20188fd3-c330-4c76-912b-72731e14c450?source=cve
- plugins.trac.wordpress.org /browser/payment-gateway-pix-for-woocommerce/tags/1.4.0/Includes/LknPaymentPixForWoocommercePixC6.php#L694
- plugins.trac.wordpress.org /changeset/3480639/payment-gateway-pix-for-woocommerce#file56
Sources
- CVE List CVE-2026-3891
- NVD CVE-2026-3891
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.