TI-2025-33721 Aliases CVE-2025-53829

ownCloud 10 is vulnerable to Relative Path Traversal

LOW 37CWE-23Published 2026-07-06 · Updated 2026-07-08

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

ownCloud is a file storage, synchronization, and sharing application. In ownCloud 10 prior to version 10.15.3, an attacker with administrative privileges can exploit a path traversal vulnerability in the system to execute arbitrary code. Upgrade ownCloud 10 to version 10.15.3 or later to receive a patch.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00511 43rd percentileScored 2026-11-07

Fix Fixed ownCloud 10 (owncloud): 10.15.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ownCloud	ownCloud 10	before 10.15.3	10.15.3	Patch available	CNA

ownCloud 10 VendorownCloud Affected before 10.15.3 Fixed in 10.15.3 Patch available CNA

Remediation

Fix · CNA ownCloud 10 (owncloud) Fixed in 10.15.3

Timeline

2026-10-02 Threatist record created from CVE-2025-53829

References

Other 1

https://github.com/owncloud/security-advisories/security/advisories/GHSA-4439-4wxm-c9px

TI-2023-26770 An issue was discovered in ownCloud owncloud/core before 10.13.1. KEVCVSS 3.1CRITICAL 9.8
TI-2023-26768 An issue was discovered in ownCloud owncloud/graphapi 0.2.x before 0.2.1 and 0.3.x before… KEVCVSS 3.1CRITICAL 10.0
TI-2019-15391 OwnCloud 8.1.8 - Username Disclosure CVSS 4.0MEDIUM 5.3
TI-2015-03941 Directory traversal vulnerability in the routing component in ownCloud Server before… CVSS 2.0HIGH 10.0
TI-2025-37176 ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the… CVSS 3.1MEDIUM 5.3
TI-2023-09745 ownCloud Android app vulnerable to SQL Injection CVSS 3.1MEDIUM 6.2

See all 172 →

Sources

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