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XSS in Error Page

Platform: ownCloud Server

Versions: 10.0.2,

Date: 5/31/2017

Risk level: Medium

CVSS v3 Base Score: 4.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)

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

HackerOne report: 215410


A Attacker can inject HTML script code into a error message

Affected Software

  • ownCloud Server < 10.0.2 (CVE-2017-8896)
  • ownCloud Server < 9.1.6 (CVE-2017-8896)
  • ownCloud Server < 9.0.10 (CVE-2017-8896)
  • ownCloud Server < 8.2.12 (CVE-2017-8896)

Action Taken

Escape output


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

  • Manuel Mancera – Vulnerability discovery and disclosure.

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