XSS in Mybb
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Mybb — versions 1.8.17
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/45393/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- blog.mybb.com/2018/08/22/mybb-1-8-18-released-security-maintenance-release/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2018-15596?
- CVE-2018-15596 is a medium-severity vulnerability in Mybb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-08-28.
- How severe is CVE-2018-15596?
- Medium severity. CVSS v3 base score is 6.1 out of 10.