Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login
Priority MEDIUM 64CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.
Summary
The Backup Migration WordPress plugin before 2.1.7 does not properly restrict a post-restore automatic login mechanism, allowing a user who administers one site of a multisite network to obtain a long-lived authenticated session as an administrator of another site in the same network, without credentials and bypassing two-factor authentication.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00506 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Backup Migration (Unknown): 2.1.7
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 | Backup Migration | before 2.1.7 | 2.1.7 | Patch available | CNA |
- Backup Migration VendorUnknown Affected before 2.1.7 Fixed in 2.1.7 Patch available CNA
Remediation
- Fix · CNA Backup Migration (Unknown) Fixed in 2.1.7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18216
- 2026-10-03 Alias added: GHSA-g4x6-qr8w-c3x7
References
Sources
- CVE-2026-18216 · CVE Program
- CVE-2026-18216 · NVD
- FIRST EPSS
- GHSA-g4x6-qr8w-c3x7 · 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