Hummingbird < 3.21.2 - Admin+ Network-Wide RCE via Hub Connector on Multisite
Priority LOW 35CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-94.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00665 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Hummingbird Performance (Unknown): 3.21.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Hummingbird Performance | 3.15.0 to before 3.21.2 | 3.21.2 | Patch available | CNA |
- Hummingbird Performance VendorUnknown Affected 3.15.0 to before 3.21.2 Fixed in 3.21.2 Patch available CNA
Remediation
- Fix · CNA Hummingbird Performance (Unknown) Fixed in 3.21.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-19224
- 2026-10-03 Alias added: GHSA-v4wx-7r7q-x8q9
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2026-19224 · CVE Program
- CVE-2026-19224 · NVD
- FIRST EPSS
- GHSA-v4wx-7r7q-x8q9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences