CVE-2025-57751 HIGH

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

Vendor Pyload
Product pyload
Weakness CWE-400
Published August 21, 2025
Last update August 21, 2025
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 21, 2025 CVE published
August 21, 2025 Record updated