Ling101W

**Name of the Vulnerable Software and Affected Versions** HUSTOF versions prior to 26.01.24 **Description** HUSTOF is an online judge system built on PHP, C++, MySQL, and Linux. A path traversal flaw exists in the `problem import qduoj.php` and `problem import hoj.php` modules when handling ZIP archive extractions. This allows attackers to write files to arbitrary locations within the web root by crafting malicious ZIP files containing path traversal sequences, such as `../../shell.php`. Successful exploitation leads to Remote Code Execution (RCE). **Recommendations** Versions prior to 26.01.24 should be updated to version 26.01.24 or later.

**Name of the Vulnerable Software and Affected Versions** hustoj (affected versions not specified) **Description** hustoj is an open source online judge system built on PHP/C++/MySQL/Linux. The application is susceptible to CSV Injection (Formula Injection) through the contest rank export functionality, specifically in the `contestrank.xls.php` and `admin/ranklist export.php` files. The system does not properly sanitize user-provided input, particularly the `Nickname` field, before including it in exported .xls files. An attacker can exploit this by setting their nickname to an Excel formula. When an administrator opens the exported rank list in Microsoft Excel, the malicious formula will execute, potentially leading to arbitrary command execution (RCE) on the administrator’s machine or data exfiltration. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.