Quick answers
- Is CVE-2025-53829 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-53829 being exploited in the wild.
- How severe is CVE-2025-53829?
- High severity, with a CVSS score of 8, published 6 July 2026.
- Which products and versions are affected?
- Owncloud < 10.15.3.
- Is there a fix for CVE-2025-53829?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-53829 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2025-53829?
- Check whether you run Owncloud at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A relative path traversal vulnerability (CWE-23) exists in ownCloud 10 prior to version 10.15.3. The system fails to properly neutralize path sequences (such as '..') in external input used to construct file paths. An attacker with administrative privileges can exploit this to access restricted directories and achieve remote code execution (RCE). While the attack vector is network-based, the complexity is rated as high and requires high-level privileges. The issue is resolved in version 10.15.3.
Affected products
- ownCloud ownCloud 10 < 10.15.3
Timeline
- 2026-06-24: advisory: Vendor advisory published via GitHub
- 2026-07-06: disclosed: CVE published to NVD