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TI-2016-07730 Aliases CVE-2016-9459GHSA-hm6h-8cg9-xcv7

Information disclosure through error messages in Nextcloud Server & ownCloud Server…

Priority LOW 30CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure, Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-209 and CWE-79.

Summary

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.

Why it matters now

EPSS 0.01493 74th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4—No fix listedCNA
  • Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 Vendor— Affected Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*before 9.0.52Vulnerablenextcloud
cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:*before 9.0.4VulnerableownCloud
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions before 9.0.52 Vulnerable ·nextcloud
  • cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* Versions before 9.0.4 Vulnerable ·ownCloud

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-9459
  2. 2026-10-03 Alias added: GHSA-hm6h-8cg9-xcv7

References

Exploit 1

Patch 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences