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CVE-2025-61773— pyLoad CNL and captcha handlers allow code Injection via unsanitized parameters

Quick assessment

Affected
pyload pyload
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pyLoad是pyLoad开源的一个用 Python 编写的免费开源下载管理器。 pyLoad 0.5.0b3.dev91之前版本存在安全漏洞，该漏洞源于Captcha脚本端点和Click N Load Blueprint中输入验证不足，可能导致跨站脚本攻击或其他意外行为。

CVSS 8.1 · High EPSS 0.41% · P34
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I. Basic Information for CVE-2025-61773

Vulnerability Information
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Vulnerability Title
pyLoad CNL and captcha handlers allow code Injection via unsanitized parameters
Source: CVE Program / CVE List V5
Vulnerability Description
pyLoad is a free and open-source download manager written in Python. In versions prior to 0.5.0b3.dev91, pyLoad web interface contained insufficient input validation in both the Captcha script endpoint and the Click'N'Load (CNL) Blueprint. This flaw allowed untrusted user input to be processed unsafely, which could be exploited by an attacker to inject arbitrary content into the web UI or manipulate request handling. The vulnerability could lead to client-side code execution (XSS) or other unintended behaviors when a malicious payload is submitted. user-supplied parameters from HTTP requests were not adequately validated or sanitized before being passed into the application logic and response generation. This allowed crafted input to alter the expected execution flow. CNL (Click'N'Load) blueprint exposed unsafe handling of untrusted parameters in HTTP requests. The application did not consistently enforce input validation or encoding, making it possible for an attacker to craft malicious requests. Version 0.5.0b3.dev91 contains a patch for the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
pyLoad 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pyLoad是pyLoad开源的一个用 Python 编写的免费开源下载管理器。 pyLoad 0.5.0b3.dev91之前版本存在安全漏洞，该漏洞源于Captcha脚本端点和Click N Load Blueprint中输入验证不足，可能导致跨站脚本攻击或其他意外行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pyload pyload < 0.5.0b3.dev91 -

II. Public POCs for CVE-2025-61773

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6892 chars
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III. Intelligence Information for CVE-2025-61773

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Vendor Advisories for CVE-2025-61773 (1)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-74

V. Comments for CVE-2025-61773

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