CVE Feed

    Dashboard / CVE / CVE-2016-9459

    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 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.

    Published:Mar 28, 2017
    Last Modified:Apr 20, 2025
    EPS:Mar 28, 2017
    EPSS Score:0.00494
    CVSS Score:6.1

    Affected Products

    Vendor
    Nextcloud
    Product
    Nextcloud Server
    Vendor
    Owncloud
    Product
    Owncloud

    Exploits

    https://hackerone.com/reports/146278https://hackerone.com/reports/146278

    Related CVEs

    CVE-2026-45810 (CVSS 6.8) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before…
    CVE-2026-45691 (CVSS 5.9) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2026-45690 (CVSS 5.9) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2026-45285 (CVSS 6.4) — Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 …
    CVE-2026-45283 (CVSS 6.3) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2026-45282 (CVSS 6.5) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2026-45281 (CVSS 8.1) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2026-45279 (CVSS 4.4) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before…
    CVE-2026-45157 (CVSS 6.3) — Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before…
    CVE-2025-64011 (CVSS 4.3) — Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpo…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High