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TI-2023-26770 Aliases CVE-2023-49105GHSA-585g-f852-v6p4

An issue was discovered in ownCloud owncloud/core before 10.13.1.

Priority CRITICAL 100Exploited in the wildCWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.

Why it matters now

Exploitation Active In CISA KEV since 2026-08-27CISA due date 2026-08-30
EPSS 0.4319 98th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:owncloud:owncloud_server:*:*:*:*:*:*:*:*10.6.0 to before 10.13.1VulnerableownCloud
  • cpe:2.3:a:owncloud:owncloud_server:*:*:*:*:*:*:*:* Versions 10.6.0 to before 10.13.1 Vulnerable ·ownCloud

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-08-27 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2023-49105
  3. 2026-10-03 Alias added: GHSA-585g-f852-v6p4

References

Advisory 2

Other 1

  • TI-2015-03941 Directory traversal vulnerability in the routing component in ownCloud Server before… CVSS 2.0HIGH 10.0
  • TI-2014-01613 Zend Framework, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows… CVSS 3.1CRITICAL 9.8
  • TI-2014-01605 Incomplete blacklist vulnerability in ajax/upload.php in ownCloud before 5.0, when… CVSS 2.0HIGH 7.5
  • TI-2015-06396 The files_external app in ownCloud Server before 7.0.9, 8.0.x before 8.0.7, and 8.1.x… CVSS 2.0HIGH 9.0
  • TI-2015-03943 The external SMB storage driver in ownCloud Server before 6.0.8, 7.0.x before 7.0.6, and… CVSS 2.0HIGH 9.0
  • TI-2016-01386 ownCloud Server before 8.0.10, 8.1.x before 8.1.5, and 8.2.x before 8.2.2 allow remote… CVSS 3.0HIGH 8.5
See all 107 →

Sources

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