CVE-2025-54140

pyLoad is a free and open-source Download Manager written in pure Python. In version 0.5.0b3.dev89, an authenticated path traversal vulnerability exists in the /json/upload endpoint of pyLoad. By manipulating the filename of an uploaded file, an attacker can traverse out of the intended upload directory, allowing them to write arbitrary files to any location on the system accessible to the pyLoad process. This may lead to: Remote Code Execution (RCE), local privilege escalation, system-wide compromise, persistence, and backdoors. This is fixed in version 0.5.0b3.dev90.

The following products are affected by CVE-2025-54140 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-54140.

URL	Resource
https://github.com/pyload/pyload/blob/df094db67ec6e25294a9ac0ddb4375fd7fb9ba00/src/pyload/webui/app/blueprints/json_blueprint.py#L109
https://github.com/pyload/pyload/commit/fc4b136e9c4e7dcbb8e467ae802cb2c3f70a71b0
https://github.com/pyload/pyload/security/advisories/GHSA-xqpg-92fq-grfg