Simplemachines » Simple Machines Forum : Security Vulnerabilities, CVEs, CVSS score >= 6

SimpleMachinesForum 2.1.1 and earlier allows remote authenticated administrators to execute arbitrary code by inserting a vulnerable php code because the themes can be modified by an administrator. NOTE: the vendor's position is that administrators are intended to have the ability to modify themes, and can thus choose any PHP code that they wish to have executed on the server.

An issue was discovered in Simple Machines Forum (SMF) before 2.0.16. Reverse tabnabbing can occur because of use of _blank for external links.

The MessageSearch2 function in PersonalMessage.php in Simple Machines Forum (SMF) before 2.0.15 does not properly use the possible_users variable in a query, which might allow attackers to bypass intended access restrictions.

LogInOut.php in Simple Machines Forum (SMF) 2.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via vectors related to variables derived from user input in a foreach loop.

Packages.php in Simple Machines Forum (SMF) 2.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via the themechanges array parameter.

Simple Machines Forum (SMF) 2.0.4 allows PHP Code Injection via the index.php?action=admin;area=languages;sa=editlang dictionary parameter.

Simple Machines Forum (SMF) 2.0.4 allows XSS via the index.php?action=pm;sa=settings;save sa parameter.

Simple Machines Forum (SMF) 2.0.4 allows local file inclusion, with resultant remote code execution, in install.php via ../ directory traversal in the db_type parameter if install.php remains present after installation.

Simple Machines Forum (SMF) 2.0.6, 1.1.19, and earlier allows remote attackers to impersonate arbitrary users via a Unicode homoglyph character in a username.

Simple Machines Forum (SMF) before 1.1.19 and 2.x before 2.0.6 allows remote attackers to impersonate arbitrary users via multiple space characters characters.

Simple Machines Forum (SMF) through 2.0.5 has XSS

There is a file disclosure vulnerability in SMF (Simple Machines Forum) affecting versions through v2.0.3. On some configurations a SMF deployment is shared by several "co-admins" that are not trusted beyond the SMF deployment. This vulnerability allows them to read arbitrary files on the filesystem and therefore gain new privileges by reading the settings.php with the database passwords.