CVE-2026-19224

Hummingbird < 3.21.2 - Admin+ Network-Wide RCE via Hub Connector on Multisite

The Hummingbird Performance WordPress plugin before 3.21.2 does not restrict a network-wide setting to network administrators, allowing an administrator of any single site on a multisite network to execute arbitrary code across the entire network.

Affected

Hummingbird Performance

CVSS v3.1 CNA

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.37% chance of exploitation in the next 30 days, 29th percentile

Published

2026-09-04

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/443461c5-93c4-49b4-a5c2-057b7afa4ce6/

References

• CVE Record
• NVD entry