CVE-2026-18216— Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login
Quick assessment
Affected
Unknown Backup Migration
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Backup Migration WordPress 插件版本低于 2.1.7 的版本中，存在一个恢复后自动登录机制未能正确限制的问题。这使得一名管理多站点网络中某个站点的用户，可以在不提供凭证的情况下，绕过双因素认证，获得作为该网络中另一站点管理员的长期认证会话。
Possible ATT&CK Techniques 3 AI
T1528 · Steal Application Access Token T1078 · Valid Accounts T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Unknown | Backup Migration | < 2.1.7 |
affected |
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I. Basic Information for CVE-2026-18216
Vulnerability Information
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Vulnerability Title
Backup Migration < 2.1.7 - Admin+ Privilege Escalation via Post-Restore Auto-Login
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Backup Migration | 0 ~ 2.1.7 | - |
|
II. Public POCs for CVE-2026-18216
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Pages for CVE-2026-18216 (1)
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🔗 Backup Migration < 2.1.7 – Admin+ Privilege Escalation via Post-Restore Auto-Login | CVE 2026-18216 | Plugin Vulnerabilities Read full article exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-08-15 · 6 CVEs total
| CVE-2026-14230 | ECS < 4.3.8 - Contributor+ Stored XSS via Dynamic Repeater Bindings | |
| CVE-2026-14229 | ECS < 4.3.8 - Unauthenticated Private Content Disclosure via ecsload | |
| CVE-2026-16541 | Simply Schedule Appointments < 1.6.12.17 - Team Member+ User Email Disclosure via Users an | |
| CVE-2026-16611 | Product Feed PRO for WooCommerce < 13.5.7 - Unauthenticated Feed Configuration Disclosure | |
| CVE-2026-18807 | ECS < 4.3.8 - Contributor+ Arbitrary Post Binding and Global Preset Modification via Dynam |
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V. Comments for CVE-2026-18216
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