Path Traversal in Pyload
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.006 (47.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Pyload — versions >= 0.5.0b3.dev89, < 0.5.0b3.dev90
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-54140?
- CVE-2025-54140 is a high-severity vulnerability in Pyload, classified under Path Traversal. CVSS score: 7.5/10. Published 2025-07-22.
- How severe is CVE-2025-54140?
- High severity. CVSS v3 base score is 7.5 out of 10.