In MyBB before 1.8.21, an attacker can abuse a default behavior of MySQL on many systems (that leads to truncation of strings that are too long for a database column) to create a PHP shell in the cache directory of a targeted forum via a crafted XML import, as demonstrated by truncation of aaaaaaaaaaaaaaaaaaaaaaaaaa.php.css to aaaaaaaaaaaaaaaaaaaaaaaaaa.php with a 30-character limit, aka theme import stylesheet name RCE.
CVSS Score
7.2
EPSS Score
0.005
Published
2019-06-15
A reflected XSS vulnerability in the ModCP Profile Editor in MyBB before 1.8.20 allows remote attackers to inject JavaScript via the 'username' parameter.
CVSS Score
6.1
EPSS Score
0.003
Published
2019-03-29
A Persistent XSS issue was discovered in the Visual Editor in MyBB before 1.8.19 via a Video MyCode.
CVSS Score
5.4
EPSS Score
0.014
Published
2018-09-17
MyBB Group MyBB contains a File Inclusion vulnerability in Admin panel (Tools and Maintenance -> Task Manager -> Add New Task) that can result in Allows Local File Inclusion on modern PHP versions and Remote File Inclusion on ancient PHP versions. This attack appear to be exploitable via Must have access to admin panel. This vulnerability appears to have been fixed in 1.8.15.
CVSS Score
7.2
EPSS Score
0.007
Published
2018-06-26
MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password. This attack appear to be exploitable via Subscribe to a forum through IDOR. This vulnerability appears to have been fixed in 1.8.15.
CVSS Score
4.3
EPSS Score
0.001
Published
2018-06-26
The installer in MyBB before 1.8.13 allows remote attackers to execute arbitrary code by writing to the configuration file.
CVSS Score
9.8
EPSS Score
0.019
Published
2017-11-10
The installer in MyBB before 1.8.13 has XSS.
CVSS Score
5.4
EPSS Score
0.003
Published
2017-11-10
In MyBB before 1.8.11, the Email MyCode component allows XSS, as demonstrated by an onmouseover event.
CVSS Score
6.1
EPSS Score
0.003
Published
2017-04-24
In MyBB before 1.8.11, the smilie module allows Directory Traversal via the pathfolder parameter.
CVSS Score
5.3
EPSS Score
0.013
Published
2017-04-24
MyBB before 1.8.11 allows remote attackers to bypass an SSRF protection mechanism.
CVSS Score
7.7
EPSS Score
0.006
Published
2017-04-06