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CVE-2026-57311 is an unrestricted file upload vulnerability in Windu CMS, confirmed in version 4.1. The application does not properly validate the types of uploaded files, allowing an authenticated attacker to upload arbitrary content, including server-executable PHP files. If the uploaded file is placed in a web-accessible location and processed by the server, the flaw can be leveraged to achieve remote code execution on the affected Windu CMS instance. Other versions may also be affected, but this has not been confirmed.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 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.