Vulnerability Description
Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/theopaid/Insufficient-Access-Controls-Allow-for-Unauthorized-
- https://www.vulncheck.com/advisories/let-s-chat-broken-access-control-file-discl
FAQ
What is CVE-2026-66750?
CVE-2026-66750 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a ...
How severe is CVE-2026-66750?
CVE-2026-66750 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-66750?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.