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HIGH

CVE-2026-10818

CVSS v3

8.1

HIGH

EPSS Score

2.5 %

exploit probability, as of 2026-10-06

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-07-25
Last Modified
2026-07-25

Frequently asked questions

What is CVE-2026-10818?

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.

Is CVE-2026-10818 actively exploited?

Active exploitation of CVE-2026-10818 has not been confirmed. Its EPSS score was 2.5% on 2026-10-06, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-10818?

CVE-2026-10818 has a CVSS v3 base score of 8.1 (HIGH severity).

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