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Reflected XSS in Gallery application

Platform: ownCloud Server

Versions: 9.0.6, 9.1.2,

Date: 11/10/2016

Risk level: Medium

CVSS v3 Base Score: 6.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

CWE: Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’) (CWE-79)

HackerOne report: 165686

Description

The gallery app was not properly sanitizing exception messages from the ownCloud server. Due to an endpoint where an attacker could influence the error message this lead to a reflected Cross-Site-Scripting vulnerability.

Affected Software

Action Taken

Error messages are now properly sanitized.

Acknowledgements

The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory:

  • Aliaksei Panamarenka – Vulnerability discovery and disclosure.

This advisory is licensed CC BY-SA 4.0. Original source: nextcloud.com

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