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CVE-2025-54802— pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)

Quick assessment

Affected
pyload pyload
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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及之前版本存在安全漏洞，该漏洞源于路径遍历漏洞，可能导致任意文件写入和远程代码执行。

CVSS 9.8 · Critical EPSS 1.19% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-54802

Vulnerability Information
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Vulnerability Title
pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)
Source: CVE Program / CVE List V5
Vulnerability Description
pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
pyLoad 安全漏洞
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及之前版本存在安全漏洞，该漏洞源于路径遍历漏洞，可能导致任意文件写入和远程代码执行。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
pyload pyload >= 0.5.0b3.dev89, < 0.5.0b3.dev90 -

II. Public POCs for CVE-2025-54802

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 11724 chars
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III. Intelligence Information for CVE-2025-54802

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Patches & Fixes for CVE-2025-54802 (1)

Vendor Advisories for CVE-2025-54802 (1)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-22

V. Comments for CVE-2025-54802

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