Published: 28/03/2017 Updated: 09/10/2019

CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 6.1 | Impact Score: 2.7 | Exploitability Score: 2.8

VMScore: 383

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Nextcloud Server prior to 9.0.52 & ownCloud Server prior to 9.0.4 are vulnerable to a log pollution vulnerability potentially leading to a local XSS. The download log functionality in the admin screen is delivering the log in JSON format to the end-user. The file was delivered with an attachment disposition forcing the browser to download the document. However, Firefox running on Microsoft Windows would offer the user to open the data in the browser as an HTML document. Thus any injected data in the log would be executed.

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nextcloud nextcloud server
owncloud owncloud

CWE-79 https://owncloud.org/security/advisory?id=oc-sa-2016-012 https://nextcloud.com/security/advisory/?id=nc-sa-2016-002 https://hackerone.com/reports/146278 https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dc https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1 https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335 https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070 http://www.securityfocus.com/bid/97284 https://nvd.nist.gov

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CVE-2016-9459

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