CVE-2005-1833 in MyBB
Summary
by MITRE
Multiple SQL injection vulnerabilities in MyBulletinBoard (MyBB) 1.00 RC4 allow remote attackers to execute arbitrary SQL commands via the (1) eid parameter to calendar.php, (2) idsql parameter to online.php, (3) usersearch parameter to memberlist.php, (4) pid parameter to editpost.php, (5) fid parameter to forumdisplay.php, (6) tid parameter to newreply.php, (7) sid parameter to search.php, (8) tid or (9) pid parameter to showthread.php, (10) tid parameter to usercp2.php, (11) tid parameter to printthread.php, or (12) pid parameter to reputation.php.
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Analysis
by VulDB Data Team • 08/24/2025
The vulnerability described in CVE-2005-1833 represents a critical SQL injection flaw affecting MyBulletinBoard version 1.00 RC4, a popular web-based discussion forum software. This vulnerability stems from insufficient input validation and sanitization within multiple script files that handle user-supplied data directly in SQL query construction. The flaw allows remote attackers to manipulate database queries by injecting malicious SQL code through various parameters across different forum functions, fundamentally compromising the integrity and confidentiality of the underlying database system. The vulnerability affects core forum operations including calendar management, user listings, post editing, thread viewing, and search functionalities, making it particularly dangerous as it spans across multiple administrative and user-facing components.
The technical exploitation of this vulnerability occurs when user input parameters are directly concatenated into SQL statements without proper sanitization or parameterization. Each affected parameter serves as a potential injection point where malicious SQL commands can be executed against the database server. The specific parameters targeted include eid in calendar.php, idsql in online.php, usersearch in memberlist.php, and numerous others across various forum scripts. These injection points are particularly dangerous because they allow attackers to perform unauthorized database operations such as data retrieval, modification, deletion, or even privilege escalation. The vulnerability aligns with CWE-89 which categorizes SQL injection as a fundamental weakness in software design that enables attackers to manipulate database queries through untrusted input.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with comprehensive database access capabilities that can lead to complete system compromise. An attacker could extract sensitive user information including passwords, personal details, and private messages, potentially leading to identity theft or further exploitation of the compromised system. The vulnerability also enables attackers to modify forum content, delete posts, manipulate user permissions, or even inject malicious code into the forum environment. This type of vulnerability falls under the ATT&CK technique T1071.004 for application layer protocol manipulation and T1190 for exploitation of remote services, representing a significant risk to forum administrators and their users. The widespread nature of the affected parameters suggests that this vulnerability could be exploited across multiple forum operations, amplifying its potential impact.
Mitigation strategies for this vulnerability must focus on implementing proper input validation and parameterized queries throughout the affected MyBB scripts. The most effective remediation involves sanitizing all user inputs before incorporating them into SQL statements and implementing prepared statements or parameterized queries to prevent malicious code execution. Administrators should immediately upgrade to patched versions of MyBB or apply the appropriate security patches released by the development team. Additionally, implementing proper access controls, database user permissions, and input filtering mechanisms can help reduce the potential impact of such vulnerabilities. Security monitoring and intrusion detection systems should be configured to detect unusual database access patterns that might indicate exploitation attempts, while regular security audits of web applications should be conducted to identify similar vulnerabilities in other software components. The vulnerability demonstrates the critical importance of secure coding practices and input validation in preventing database-related attacks that can compromise entire systems.