CVE-2017-16821: b3log Symphony

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

b3log Symphony (aka Sym) 2.2.0 has XSS in processor/AdminProcessor.java in the admin console, as demonstrated by a crafted X-Forwarded-For HTTP header that is mishandled during display of a client IP address in /admin/user/userid.

Affected products

• b3log Symphony: version 2.2.0 only

Published 2017-11-15. Last modified 2026-06-17.