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Description

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.

PUBLISHED Reserved 2025-07-16 | Published 2025-07-22 | Updated 2025-07-23 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

>= 0.5.0b3.dev89, < 0.5.0b3.dev90
affected

References

github.com/...pyload/security/advisories/GHSA-xqpg-92fq-grfg

github.com/...ommit/fc4b136e9c4e7dcbb8e467ae802cb2c3f70a71b0

github.com/.../pyload/webui/app/blueprints/json_blueprint.py

cve.org (CVE-2025-54140)

nvd.nist.gov (CVE-2025-54140)

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