CVE-2016-9459

Name: CVE-2016-9459
Creator: NVD / NIST
Published: 2017-03-28T02:59:00.73+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.49%

Last modified Jun 17, 2026

CVE-2016-9459 is a vulnerability of currently unknown severity. Nextcloud Server before 9.0.52 & ownCloud Server before 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. EPSS estimates a 1.49% chance of exploitation in the next 30 days.

Description

Nextcloud Server before 9.0.52 & ownCloud Server before 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.

Metrics

EPSS Probability

1.49%

70.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 9.0.52
Owncloud	Owncloud	< 9.0.4

References

http://www.securityfocus.com/bid/97284Third Party Advisory, VDB Entry
https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dcIssue Tracking, Patch, Third Party Advisory
https://hackerone.com/reports/146278Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2016-002Patch, Vendor Advisory
https://owncloud.org/security/advisory?id=oc-sa-2016-012Patch, Vendor Advisory
http://www.securityfocus.com/bid/97284Third Party Advisory, VDB Entry
https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1Issue Tracking, Patch, Third Party Advisory
https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dcIssue Tracking, Patch, Third Party Advisory
https://hackerone.com/reports/146278Exploit, Third Party Advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2016-002Patch, Vendor Advisory
https://owncloud.org/security/advisory?id=oc-sa-2016-012Patch, Vendor Advisory

Timeline

Published: Mar 28, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9459?

How severe is CVE-2016-9459?

Severity scoring for CVE-2016-9459 is pending analysis. The EPSS model estimates a 1.49% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9459?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9459?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST