Cross-Site Request Forgery Vulnerability in Modular DS Plugin for WordPress
CVE-2026-3903

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
Modular Ds: Monitor, Update, And Backup Multiple Websites
Vendor
CVE Published:
11 March 2026

What is CVE-2026-3903?

The Modular DS: Monitor, update, and backup multiple websites plugin for WordPress is susceptible to Cross-Site Request Forgery (CSRF) across all versions up to and including 2.5.1. This vulnerability arises from inadequate nonce validation in the postConfirmOauth() function. As a result, unauthenticated attackers can exploit this flaw to sever the plugin’s OAuth/SSO connection by tricking a site administrator into executing malicious actions, such as clicking a deceptive link.

Affected Version(s)

Modular DS: Monitor, update, and backup multiple websites 0 <= 2.5.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3441222/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dmitrii Ignatyev
.