CVE-2018-15596

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.

Date published : 2018-08-28

MyBB 1.8.18 Released — Security & Maintenance Release

https://www.exploit-db.com/exploits/45393/