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CVE-2026-16098 is a critical arbitrary file upload vulnerability in the ProSolution WP Client plugin for WordPress affecting all versions up to and including 2.0.10. The flaw is in the proSol_handleFileUpload function. The upload logic fails to validate an attacker-controlled filename supplied in the Content-Disposition header, allowing that value to override the allow-listed multipart filename before the file is written to disk. The plugin then performs an extension check only after the file has already been saved, and that post-save validation does not remove the malicious file. In addition, the nonce used to gate access to the upload handler is publicly exposed through wp_localize_script on front-end pages that render the job portal shortcode, allowing unauthenticated visitors to obtain a valid nonce. Together, these weaknesses allow unauthenticated attackers to upload potentially executable files to the server, creating a path to remote code execution.
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No public exploit code observed for this vulnerability.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical unauthenticated arbitrary file upload vulnerability in the ProSolution WP Client WordPress plugin that allows attackers to upload malicious PHP files and achieve remote code execution and full site compromise.
An unauthenticated arbitrary file upload vulnerability in the ProSolution WP Client WordPress plugin affecting versions up to and including 2.0.10. Missing validation of the Content-Disposition filename and a failed post-save extension check can allow upload of executable files, making remote code execution possible.
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.