CVE-2017-5539: b2evolution

Critical severity, CVSS 9.1. EPSS: 4.3% chance of exploitation in the next 30 days.

The patch for directory traversal (CVE-2017-5480) in b2evolution version 6.8.4-stable has a bypass vulnerability. An attacker can use ..\/ to bypass the filter rule. Then, this attacker can exploit this vulnerability to delete or read any files on the server. It can also be used to determine whether a file exists.

Affected products

Published 2017-01-23. Last modified 2026-06-17.