HexBrain

Nextcloud · Report #2247457

Can download files by zipping the folder

Validstatus
mediumseverity
41upvotes
17 Feb 2024disclosed

Summary

Security advisory at https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vhj3-mch4-67fq

How it was found

  1. Create folder and share it as view-only

{F2846936}

  1. Access this folder with Testuser

{F2846943}

  1. Go one level up and compress the whole folder

{F2846942}

  1. The zip file can be downloaded and extracted locally

{F2846939} {F2846941}

  1. The folder itself can not be downloaded directly

{F2846937}

Impact

Can download files without download permissions

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original