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Vulnerability record · CVE-2026-10818 · published 25 July 2026

CVE-2026-10818: Unrestricted file upload vulnerability

The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents have already been written to disk, and the assembled file not being deleted upon validation failure. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

8.1 CVSS 3.1 High EPSS 0.71% · top 48.3% CWE-434 · Unrestricted file upload Deferred
8.1CVSS 3.1 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
27 Jul 2026Last modified by NVD

Description

The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.10.1.1 via the ajax_chunk_upload_finalize function. This is due to the file type validation occurring after chunk metadata and file contents have already been written to disk, and the assembled file not being deleted upon validation failure. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://wpforms.com/
https://www.wordfence.com/threat-intel/vulnerabilities/id/b267f163-966a-43f7-8a7c-67d34c2c7e9d?source=cve

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-10818), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.