Stored XSS via Form Plugin file upload in Connect-CMS
CVE-2026-32278 is a stored cross-site scripting vulnerability in Connect-CMS affecting 1.x versions through 1.41.0 and 2.x versions through 2.41.0. The issue is in the Form Plugin's file field, which allows user-supplied files to be uploaded through public-facing forms. Based on the provided context, the application does not enforce a strict whitelist of safe file extensions and permits dangerous file types such as HTML to be uploaded and stored. Prior to the patch, uploaded .html files could be served inline by the application rather than forced to download, allowing embedded JavaScript to execute when the file was opened. The vulnerability is therefore described as stored XSS, while the underlying weakness is classified as unrestricted upload of a file with a dangerous type (CWE-434).
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Exploits
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No public exploit code observed for this vulnerability.
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Recent activity
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unrestricted file upload vulnerability in the Connect-CMS Form Plugin that allows dangerous files such as HTML to be uploaded and later rendered inline, leading to stored cross-site scripting in an administrator's browser session.
A stored cross-site scripting vulnerability in the file field of the Form Plugin in Connect-CMS affecting 1.x through 1.41.0 and 2.x through 2.41.0.
The version that knows your environment.
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.