CVE-2024-7983: Open WebUI denial of service through endpoint for converting markdown

March 20, 2025 (updated March 21, 2025)

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

References

github.com/advisories/GHSA-5v9m-57mq-qc75
github.com/open-webui/open-webui
github.com/open-webui/open-webui/blob/eff736acd2e0bbbdd0eeca4cc209b216a1f23b6a/backend/apps/webui/routers/utils.py
huntr.com/bounties/f8156ca5-1328-480f-a72b-8d3dfdad87dc
nvd.nist.gov/vuln/detail/CVE-2024-7983

Code Behaviors & Features

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