HUSTOF is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. Prior to version 26.01.24, the problem_import_qduoj.php and problem_import_hoj.php modules fail to properly sanitize filenames within uploaded ZIP archives. Attackers can craft a malicious ZIP file containing files with path traversal sequences (e.g., ../../shell.php). When extracted by the server, this allows writing files to arbitrary locations in the web root, leading to Remote Code Execution (RCE). Version 26.01.24 contains a fix for the issue.
CVSS Score
9.8
EPSS Score
0.006
Published
2026-01-27
hustoj is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. All versions are vulnerable to CSV Injection (Formula Injection) through the contest rank export functionality (contestrank.xls.php and admin/ranklist_export.php). The application fails to sanitize user-supplied input (specifically the "Nickname" field) before exporting it to an .xls file (which renders as an HTML table but is opened by Excel). If a malicious user sets their nickname to an Excel formula when an administrator exports and opens the rank list in Microsoft Excel, the formula will be executed. This can lead to arbitrary command execution (RCE) on the administrator's machine or data exfiltration. A fix was not available at the time of publication.
CVSS Score
9.0
EPSS Score
0.0
Published
2026-01-22
Cross site scripting (XSS) vulnerability in Hustoj 2025-01-31 via the TID parameter to thread.php.
CVSS Score
6.1
EPSS Score
0.0
Published
2025-08-19
Hustoj 22.09.22 has a XSS Vulnerability in /admin/problem_judge.php.
CVSS Score
6.1
EPSS Score
0.002
Published
2022-11-17