9001 copyparty up to 1.18.8 Recent Uploads Page filter resource consumption

Summaryinfo

A vulnerability has been found in 9001 copyparty up to 1.18.8 and classified as problematic. Impacted is an unknown function of the component Recent Uploads Page. The manipulation of the argument filter leads to resource consumption. This vulnerability is uniquely identified as CVE-2025-54796. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in 9001 copyparty up to 1.18.8 and classified as problematic. This issue affects an unknown part of the component Recent Uploads Page. The manipulation of the argument filter with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. The summary by CVE is:

Copyparty is a portable file server. Versions prior to 1.18.9, the filter parameter for the "Recent Uploads" page allows arbitrary RegExes. If this feature is enabled (which is the default), an attacker can craft a filter which deadlocks the server. This is fixed in version 1.18.9.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-54796 since 07/29/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.18.9 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 09910ba80784c3980947d92f45db696398c0fd83 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23411). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• 9001

Name

• copyparty

Version

• 1.18.0
• 1.18.1
• 1.18.2
• 1.18.3
• 1.18.4
• 1.18.5
• 1.18.6
• 1.18.7
• 1.18.8

License

• open-source

Website

• Product: https://github.com/9001/copyparty/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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