Arbitrary Code Execution Vulnerability in Hummingbird Performance Plugin for WordPress
CVE-2026-19224

Currently unrated

Key Information:

Vendor

WordPress
Status
Hummingbird Performance
Vendor
CVE Published:
4 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19224?

The Hummingbird Performance plugin for WordPress is vulnerable due to improper restrictions on network-wide settings. This flaw enables an administrator of any individual site within a multisite network to execute arbitrary code, thereby compromising the entire network's security. This vulnerability arises from inadequate governance of admin permissions, making it essential for site administrators to update to version 3.21.2 or above to mitigate the risk.

Affected Version(s)

Hummingbird Performance 3.15.0 < 3.21.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19224 - Proof of Concept

References

https://wpscan.com/vulnerability/443461c5-93c4-49b4-a5c2-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jakub Herman
WPScan
.