Vulnerability CVE-2018-15596
Published: 2018-08-28

Description:
An issue was discovered in inc/class_feedgeneration.php in MyBB 1.8.17. On the forum RSS Syndication page, one can generate a URL such as http://localhost/syndication.php?fid=&type=atom1.0&limit=15. The thread titles (within title elements of the generated XML documents) aren't sanitized, leading to XSS.

See advisories in our WLB2 database:
Topic
Author
Date
Low
MyBB 1.8.17 Cross-Site Scripting
0xB9
14.09.2018

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
MYBB -> MYBB 

 References:
https://blog.mybb.com/2018/08/22/mybb-1-8-18-released-security-maintenance-release/
https://www.exploit-db.com/exploits/45393/
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