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CVE-2025-8550 is a cross-site scripting vulnerability in atjiu pybbs up to version 6.0.0. The issue affects an unknown functionality associated with the /admin/topic/list endpoint. According to the provided information, manipulation of the Username argument is not properly neutralized before being rendered, allowing attacker-controlled script content to be injected into the resulting web page. The vulnerability is remotely exploitable, and public exploit information is available. A patch has been identified as commit 2fe4a51afbce0068c291bc1818bbc8f7f3b01a22.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a C-language proof-of-concept exploit for CVE-2025-8550, a reflected XSS vulnerability in atjiu pybbs (versions 6.0.0 and below). The exploit targets the /admin/topic/list endpoint, specifically the username parameter, which is not properly sanitized. The main file, exploit.c, provides a command-line tool that can inject over 20 different XSS payloads, including script, SVG, iframe, and object-based vectors. It supports multithreading for faster testing and can optionally inject a payload to exfiltrate cookies to an attacker-controlled server (specified via command-line arguments). The exploit uses libcurl for HTTP requests and supports authenticated sessions via a cookie file. The repository also includes a README with usage instructions and a LICENSE file. No hardcoded IPs or domains are present; the attacker server details are provided at runtime. The exploit is a functional PoC and does not include weaponized or framework-level automation.
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