CVE-2025-53890
Critical
Description
pyload is an open-source Download Manager written in pure Python. An unsafe JavaScript evaluation vulnerability in pyLoad’s CAPTCHA processing code allows unauthenticated remote attackers to execute arbitrary code in the client browser and potentially the backend server. Exploitation requires no user interaction or authentication and can result in session hijacking, credential theft, and full system remote code execution. Commit 909e5c97885237530d1264cfceb5555870eb9546, the patch for the issue, is included in version 0.5.0b3.dev89.
SeverityCritical
CVSS9.8
Exploit probability—
ProductPyload-ng
PublishedJul 15, 2025
First seenJul 15, 2025
Weakness typeCWE-94Code injection
How to fix
Update
- pyload-ng0.20 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pyload-ngPyPI | v < 0.20 | 0.20 |
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