Path Traversal in ownCloud 10 Prior to 10.15.3

Mitigation Strategies

To mitigate the CVE-2025-53829 vulnerability in ownCloud 10, you should upgrade your ownCloud installation to version 10.15.3 or later.

This update patches the relative path traversal vulnerability that allows attackers with administrative privileges to execute arbitrary code.

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Executive Summary

CVE-2025-53829 is a Relative Path Traversal vulnerability in ownCloud 10 versions prior to 10.15.3. It allows an attacker with administrative privileges to exploit improper handling of file path inputs containing sequences like "..". This flaw enables the attacker to access directories outside the intended restricted path, leading to the execution of arbitrary code on the system.

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Impact Analysis

This vulnerability can have severe impacts including unauthorized execution of arbitrary code by an attacker with administrative privileges. It affects the confidentiality, integrity, and availability of the system by allowing the attacker to potentially access sensitive data, modify or delete files, and disrupt normal operations.

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Detection Guidance

This vulnerability affects ownCloud 10 versions prior to 10.15.3 and involves a relative path traversal flaw exploitable by users with administrative privileges. Detection involves verifying the ownCloud version in use to determine if it is vulnerable.

To detect if your ownCloud installation is vulnerable, you can check the version by running the following command on the server hosting ownCloud:

• php occ status

This command outputs the current ownCloud version. If the version is earlier than 10.15.3, the system is vulnerable.

Additionally, monitoring for suspicious administrative activity or unexpected file system access patterns involving path traversal sequences (e.g., "..") in logs may help detect exploitation attempts, but no specific detection commands or signatures are provided.

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