{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4883 exists.","fix":"No fix has been published for CVE-2026-4883 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4883 is a critical vulnerability in Piotnet Forms, published on 19 May 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-2026-4883 and fix it if it is affected.\n\nWhat it is: CVE-2026-4883 is a critical vulnerability in Piotnet Forms, published on 19 May 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-2026-4883 exists.\n\nAffected product: Piotnet Forms. 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-2026-4883/ (Markdown: https://insights.sbomify.com/CVE-2026-4883/index.md)","id":"CVE-2026-4883","markdown":"https://insights.sbomify.com/CVE-2026-4883/index.md","name":"CVE-2026-4883","record":{"aliases":["GHSA-rpxv-q36f-v8r2"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can upload malicious files via forms if a file field is present, potentially leading to remote code execution.","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 Piotnet Forms plugin for WordPress is vulnerable to arbitrary file upload due to missing file type validation in the 'piotnetforms_ajax_form_builder' function in all versions up to, and including, 2.1.40. The plugin uses an incomplete extension blacklist that only blocks php, phpt, php5, php7, and exe extensions, while allowing dangerous extensions such as .phar or .phtml to be uploaded. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The exploit can only be exploited if a file field is added to the form.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-06-04","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":1,"refs":[{"date":"2026-06-04T12:47:15Z","kind":"github_poc","ref":"https://github.com/xShadow-Here/CVE-2026-4883","stars":0,"title":"Piotnet Forms Pro \u003c= 2.1.40 - Unauthenticated Arbitrary File Upload → RCE"},{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-4883.yaml","stars":null,"title":"Piotnet Forms Pro \u003c= 2.1.40 - Unauthenticated Arbitrary File Upload RCE"}],"tier":"weaponised"},"has_fix":null,"headline":"Piotnet Forms \u003c= 2.1.40 - Unauthenticated Arbitrary File Upload via Form File Upload","id":"CVE-2026-4883","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"file_upload","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Piotnet Addons for Elementor Pro \u003c= 7.1.70 - Unauthenticated Arbitrary File Upload via Form File Upload","id":"CVE-2026-4885"},"packages":[],"prev":{"headline":"User Registration Advanced Fields \u003c= 1.6.20 - Unauthenticated Arbitrary File Upload","id":"CVE-2026-4882"},"products":["Piotnet Forms"],"published":"2026-05-19","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":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-05-19","vendors":["Piotnet"]},"summary":"Unauthenticated attackers can upload malicious files via forms if a file field is present, potentially leading to remote code execution.","url":"https://insights.sbomify.com/CVE-2026-4883/"}