{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3891 exists.","fix":"No fix has been published for CVE-2026-3891 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3891 is a critical vulnerability in linknacional Pix for WooCommerce, published on 13 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-3891 and fix it if it is affected.\n\nWhat it is: CVE-2026-3891 is a critical vulnerability in linknacional Pix for WooCommerce, published on 13 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3891 exists.\n\nAffected product: linknacional Pix for WooCommerce. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-3891/ (Markdown: https://insights.sbomify.com/CVE-2026-3891/index.md)","id":"CVE-2026-3891","markdown":"https://insights.sbomify.com/CVE-2026-3891/index.md","name":"CVE-2026-3891","record":{"aliases":["GHSA-fpj4-w3j6-3v3w"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can upload arbitrary files via missing validation, potentially leading to remote code execution on the server.","user_interaction":"not_required","vuln_class":"file_upload"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2026-03-12","github_poc":8,"max_poc_stars":21,"metasploit":1,"nuclei":1,"refs":[{"date":"2026-07-15T19:06:14Z","kind":"github_poc","ref":"https://github.com/m4sh-wacker/CVE-2026-3891-Pix-for-WooCommerce-Plugin-Exploit","stars":21,"title":"PoC for CVE-2026-3891 — Unauthenticated Arbitrary File Upload leading to Remote Code Execution in Pix for WooCommerce \u003c= 1.5.0"},{"date":"2026-03-13T20:33:42Z","kind":"github_poc","ref":"https://github.com/joshuavanderpoll/CVE-2026-3891","stars":8,"title":"Pix for WooCommerce \u003c= 1.5.0 - Unauthenticated Arbitrary File Upload (CVE-2026-3891) PoC"},{"date":"2026-03-27T06:00:10Z","kind":"github_poc","ref":"https://github.com/Nxploited/CVE-2026-3891","stars":6,"title":"Pix for WooCommerce \u003c= 1.5.0 - Unauthenticated Arbitrary File Upload"},{"date":"2026-07-15T19:24:19Z","kind":"github_poc","ref":"https://github.com/shinthink/CVE-2026-3891","stars":4,"title":"Pix for WooCommerce Unauthenticated File Upload via certificate_crt_path Parameter | CVSS 9.8"},{"date":"2026-04-16T06:43:25Z","kind":"github_poc","ref":"https://github.com/AnggaTechI/Mass-Scanner-CVE-2026-3891","stars":2,"title":"CVE-2026-3891 Mass Scanning"},{"date":"2026-08-03T16:01:31Z","kind":"github_poc","ref":"https://github.com/Ch4120N/CVE-2026-3891","stars":2,"title":"PoC for CVE-2026-3891 – Unauthenticated File Upload RCE in Pix for WooCommerce ≤ 1.5.0. Automated nonce retrieval, PHP upload, and command execution."},{"date":"2026-03-12","kind":"metasploit","ref":"exploit/multi/http/wp_plugin_pix_unauth_rce_cve_2026_3891","stars":null,"title":"WordPress Unauthenticated RCE via Pix for WooCommerce plugin"},{"date":"2026-07-19T14:10:36Z","kind":"github_poc","ref":"https://github.com/VeronnX666/CVE-2026-3891","stars":0,"title":"This tool was created solely for educational purposes, not for criminal activities or anything of the sort. Do not misuse this tool. Good luck trying it out."}],"tier":"weaponised"},"has_fix":null,"headline":"Pix for WooCommerce \u003c= 1.5.0 - Unauthenticated Arbitrary File Upload","id":"CVE-2026-3891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"file_upload","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Path traversal in Motors – Car Dealership \u0026 Classified Listings Plugin","id":"CVE-2026-3892"},"packages":[],"prev":{"headline":"Spoofing issue in Thunderbird","id":"CVE-2026-3889"},"products":["Pix for WooCommerce"],"published":"2026-03-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-08","vendors":["linknacional"]},"summary":"Unauthenticated attackers can upload arbitrary files via missing validation, potentially leading to remote code execution on the server.","url":"https://insights.sbomify.com/CVE-2026-3891/"}