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.
Exploits (1)
References (2)
Core 2
Core References
Exploit, Third Party Advisory, VDB Entry exploit
x_refsource_exploit-db
https://www.exploit-db.com/exploits/45393/
Vendor Advisory x_refsource_confirm
https://blog.mybb.com/2018/08/22/mybb-1-8-18-released-security-maintenance-release/
Scores
CVSS v3
6.1
EPSS
0.0130
EPSS Percentile
79.9%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Details
CWE
CWE-79
Status
published
Products (1)
mybb/mybb
1.8.17
Published
Aug 28, 2018
Tracked Since
Feb 18, 2026