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CVE-2025-57751— Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs

Quick assessment

Affected
pyload pyload
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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存在资源管理错误漏洞，该漏洞源于jk参数验证不足，可能导致服务器CPU占用过高。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.33% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-57751

Vulnerability Information
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Vulnerability Title
Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs
Source: CVE Program / CVE List V5
Vulnerability Description
pyLoad is the free and open-source Download Manager written in pure Python. The jk parameter is received in pyLoad CNL Blueprint. Due to the lack of jk parameter verification, the jk parameter input by the user is directly determined as dykpy.evaljs(), resulting in the server CPU being fully occupied and the web-ui becoming unresponsive. This vulnerability is fixed in 0.5.0b3.dev92.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
pyLoad 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于jk参数验证不足，可能导致服务器CPU占用过高。
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

Vendor Product Affected Versions CPE Subscribe
pyload pyload < 0.5.0b3.dev92 -

II. Public POCs for CVE-2025-57751

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III. Intelligence Information for CVE-2025-57751

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Vendor Advisories for CVE-2025-57751 (1)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-400

V. Comments for CVE-2025-57751

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