Backup Migration Plugin up to 2.1.6 on WordPress improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.5$0-$5k0.48-

Summaryinfo

A vulnerability described as problematic has been identified in Backup Migration Plugin up to 2.1.6. The affected element is an unknown function. Executing a manipulation can lead to improper authentication. This vulnerability is registered as CVE-2026-18216. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Backup Migration Plugin up to 2.1.6. It has been declared as problematic. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at wpscan.com. This vulnerability was named CVE-2026-18216 since 07/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.1.7 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Backup Migration Plugin 2.1.7

Timelineinfo

07/29/2026 CVE reserved
08/15/2026 +17 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wpscan.com
Status: Confirmed

CVE: CVE-2026-18216 (🔒)
GCVE (CVE): GCVE-0-2026-18216
GCVE (VulDB): GCVE-100-390220

Entryinfo

Created: 08/15/2026 08:33
Changes: 08/15/2026 08:33 (54)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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