Flow

Flow has one disclosed vulnerability in the WordSec catalog, all reported in 2026; it remains unpatched as of August 2026. Their average CVSS score is 7.5, and the most serious one scores 7.5 out of 10. Severity breakdown: 0 critical and 1 high.

The most common weakness is PHP Remote File Inclusion, behind 1 of the records (100%).

The one issue recorded for Flow has no published fix yet, which makes virtual patching the only reliable mitigation. The oldest unresolved one dates back to 2026.

All of these findings were reported by João Pedro S Alcântara (Kinorth). Flow is installed on roughly 300 WordPress sites, so each unpatched flaw has a wide blast radius. The upstream project has not shipped an update in about 17 years, so new fixes are unlikely to arrive on their own.