RCE in Hummingbird Performance

CVE-2026-19224

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.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-19224: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Hummingbird Performance

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-19224?
CVE-2026-19224 is a high-severity vulnerability in Hummingbird Performance, classified under Code Injection. CVSS score: 7.2/10. Published 2026-09-04.
How severe is CVE-2026-19224?
High severity. CVSS v3 base score is 7.2 out of 10.