{"id":"CVE-2016-9459","aliases":["EUVD-2016-10265","GHSA-hm6h-8cg9-xcv7"],"status":"published","title":"Nextcloud Server before 9.0.52 \u0026 ownCloud Server before 9.0.4 are vulnerable to a log pollution...","description":"Nextcloud Server before 9.0.52 \u0026 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.","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01493,"percentile":0.74319,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-209","CWE-79"],"published":"2017-03-28T02:46:00Z","modified":"2026-10-24T10:47:30Z","products":[{"vendor":"nextcloud","product":"nextcloud_server"},{"vendor":"owncloud","product":"owncloud"}],"references":[{"url":"https://owncloud.org/security/advisory?id=oc-sa-2016-012","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://hackerone.com/reports/146278","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dc","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-002","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"http://www.securityfocus.com/bid/97284","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-9459"},{"url":"https://github.com/advisories/GHSA-hm6h-8cg9-xcv7"}],"sources":{"cve":[{"id":"CVE-2016-9459","description":"Nextcloud Server before 9.0.52 \u0026 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.","status":"published","published":"2017-03-28T02:46:00Z","modified":"2024-08-06T02:50:38.563Z","cwes":["CWE-209"],"updated_at":"2026-11-02T14:33:32.103757Z"}],"euvd":[{"id":"EUVD-2016-10265","description":"Nextcloud Server before 9.0.52 \u0026 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.","status":"published","published":"2017-03-28T02:46:00Z","modified":"2024-08-06T02:50:38Z","updated_at":"2026-11-03T02:22:27.235814Z"}],"ghsa":[{"id":"GHSA-hm6h-8cg9-xcv7","title":"Nextcloud Server before 9.0.52 \u0026 ownCloud Server before 9.0.4 are vulnerable to a log pollution...","description":"Nextcloud Server before 9.0.52 \u0026 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.","status":"published","published":"2022-05-13T01:38:33Z","modified":"2025-04-20T03:35:59Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79","CWE-209"],"updated_at":"2026-11-02T15:01:43.480751Z"}],"nvd":[{"id":"CVE-2016-9459","description":"Nextcloud Server before 9.0.52 \u0026 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.","status":"published","published":"2017-03-28T02:59:00.73Z","modified":"2026-06-17T00:56:06.58Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-209","CWE-79"],"updated_at":"2026-11-02T14:03:37.238712Z"}],"osv":[{"id":"CVE-2016-9459","description":"Nextcloud Server before 9.0.52 \u0026 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.","status":"published","published":"2017-03-28T02:59:00.73Z","modified":"2026-10-24T10:47:30.472445438Z","cvss":[{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:03.472693Z"}]}}