Missing Authorization for Interactive Sessions
June 9, 2025
Products Impacted
This vulnerability is present in all versions of BackendAI. We tested on version 25.3.3 (commit f7f8fe33ea0230090f1d0e5a936ef8edd8cf9959).
CVSS Score: 8.1
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE Categorization
CWE-862: Missing authorization
Details
When a user starts an interactive session, a web terminal gets exposed to a random port. A threat actor can scan the ports until they find an open interactive session and access it without any authorization or prior authentication.
To reproduce this, we created a session with all settings set to default.
Then, we accessed the web terminal in a new tab
However, while simulating the threat actor, we access the same URL in an “incognito window” — eliminating any cache, cookies, or login credentials — we can still reach it, demonstrating the absence of proper authorization controls.
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