Modular Connector <= 2.5.1 - Cross-Site Request Forgery via postConfirmOauth

2026-03-10 00:00

Dmitrii Ignatyev

Strategic Overview

Status

Patched in 2.6.0

Affected PluginModular DS: Monitor, update, and backup multiple websites

Affected Version<= 2.5.1

CVSS4.3Medium

CVECVE-2026-3903

View all Modular DS: Monitor, update, and backup multiple websites vulnerabilities

Vulnerability Overview

The Modular DS: Monitor, update, and backup multiple websites plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.5.1. This is due to missing nonce validation on the postConfirmOauth() function. This makes it possible for unauthenticated attackers to disconnect the plugin's OAuth/SSO connection via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Technical Analysis

REMEDIATION: Update to version 2.6.0, or a newer patched version --- IDENTIFIER: CWE-352 (Cross-Site Request Forgery (CSRF)) The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

External References

https://www.cve.org/CVERecord?id=CVE-2026-3903 https://www.wordfence.com/threat-intel/vulnerabilities/id/913a94ad-f425-4d24-9e23-7074ecfed8ad

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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