CVE-2025-54140— pyLoad has Path Traversal Vulnerability in json/upload Endpoint that allows Arbitrary File Write
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I. Basic Information for CVE-2025-54140
Vulnerability Information
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Vulnerability Title
pyLoad has Path Traversal Vulnerability in json/upload Endpoint that allows Arbitrary File Write
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
pyLoad 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pyLoad是pyLoad开源的一个用 Python 编写的免费开源下载管理器。 pyLoad 0.5.0b3.dev89版本存在路径遍历漏洞，该漏洞源于/json/upload端点存在路径遍历，可能导致任意文件写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-54140
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IV. Related Vulnerabilities
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Authorization Bypass for SSL Certificate/Key Configuration D
Same vendor: pyload
- CVE-2026-41133
pyLoad has Stale Session Privilege After Role/Permission Cha - CVE-2026-40594
pyLoad: Session Cookie Security Downgrade via Untrusted X-Fo - CVE-2026-40071
pyLoad WebUI JSON permission mismatch lets ADD/DELETE users - CVE-2026-35592
pyLoad has an Incomplete Tar Path Traversal Fix in UnTar._sa - CVE-2026-35586
Authorization Bypass for SSL Certificate/Key Configuration D
Same weakness: CWE-22
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