CVE-2016-9459
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are vulnerable to a log pollution vulnerability potentially leading to a…
- Published
- Updated
- Reserved
- Assigned by
- hackerone
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.
Timeline
ID reserved
By hackerone
- 4 months later
· 4 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 26% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Weakness
Affected products
Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4
- affected Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4
References (8)
- https://owncloud.org/security/advisory?id=oc-sa-2016-012 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/146278 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dc (opens in a new tab)x_refsource_MISCx_transferred
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-002 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070 (opens in a new tab)x_refsource_MISCx_transferred
- 97284 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-9459)Record last updated .