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CVE-2026-10818 is an arbitrary file upload vulnerability in the WPForms Pro plugin for WordPress affecting all versions up to and including 1.10.1.1. The flaw is present in the ajax_chunk_upload_finalize function, where file type validation is performed only after chunk metadata and uploaded file contents have already been written to disk. Because the assembled file is not removed when validation fails, an attacker can cause disallowed files to remain on the server. This logic error allows unauthenticated attackers to upload files that may be executable, creating a path to remote code execution.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.