CVE-2025-53890criticalCWE-94

CVE-2025-53890: critical vulnerability in pyload

pyLoad vulnerable to remote code execution through js2py onCaptchaResult

Published · Updated

Follow this CVE+ Monitor pyload+ Monitor pyload-ng

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 1.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
pyload · pyload
Related CVEs — pyload

In the same product, most dangerous first.

CVE-2024-21644HIGHpyLoad unauthenticated flask configuration leakageEPSS 42.4%CVE-2024-21645MEDIUMpyLoad Log InjectionEPSS 24.7%CVE-2025-54802CRITICALpyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)EPSS 1.4%CVE-2024-32880CRITICALpyLoad allows upload to arbitrary folder lead to RCEEPSS 1.4%CVE-2024-22416CRITICALCross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalationEPSS 0.9%CVE-2026-35463HIGHpyLoad has Improper Neutralization of Special Elements used in an OS CommandEPSS 0.8%