CVE-2025-57751

Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs

Published Aug 21, 2025 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-25486 Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs
Github GHSA Github GHSA GHSA-9gjj-6gj7-c4wj Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs
History
Type Values Removed Values Added
First Time appeared Pyload
Pyload pyload
Vendors & Products Pyload
Pyload pyload
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Denial-of-Service attack in pyLoad CNL Blueprint using dukpy.evaljs
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 7.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 21, 2025, 6:42 PM
Reserved
Aug 19, 2025, 3:16 PM
Status
Deferred
Published
Aug 21, 2025, 7:15 PM
Modified
Jun 17, 2026, 9:43 AM