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CVE-2025-23921 is an unrestricted file upload vulnerability in sh1zen Multi Uploader for Gravity Forms for WordPress. Affected versions through 1.1.3 fail to properly restrict dangerous file types during upload, allowing an unauthenticated attacker to submit a server-executable file instead of a benign upload. If the uploaded file is placed in a web-accessible location and interpreted by the server, the flaw can be used to upload and execute a web shell on the target system.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unauthenticated arbitrary file upload vulnerability in Multi Uploader for Gravity Forms present in the actor's tooling.
An arbitrary file upload vulnerability in the WordPress Multi Uploader for Gravity Forms plugin.
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.