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CVE-2025-46571 is a stored cross-site scripting vulnerability in Open WebUI prior to version 0.6.6. A low-privileged user can upload an HTML file containing attacker-controlled JavaScript through the /api/v1/files/ backend endpoint. The application returns a file ID that can later be used to open the uploaded file in a browser, including via paths such as /api/v1/files/{id}/content/html, where the content is served as text/html. When the file is viewed, the embedded JavaScript executes in the victim's browser in the context of the Open WebUI application. Under default settings, uploaded files from low-privileged users are generally viewable only by the uploader or administrators, which constrains exposure but still enables a targeted attack against admins. The provided context indicates the vulnerable logic around file-owner validation and admin-role checks was corrected in v0.6.6.
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What an attacker gets, and what they’ve been doing with it.
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text/html content. Serve uploaded content as inert downloads where possible, apply strict content-type handling, and limit administrator exposure to user-supplied files. Operationally, reduce the likelihood of exploitation by preventing admins from opening links to uploaded user content and by segregating or minimizing high-risk administrative browsing sessions.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.
A stored XSS vulnerability in Open WebUI that can let a low-privileged user escalate to administrative access and achieve effective remote code execution via administrator interaction.
A stored cross-site scripting vulnerability in Open WebUI prior to 0.6.6 mentioned only in related content.
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.