Stored Cross-Site Scripting in Mandatory Field Plugin for WordPress
CVE-2026-1278

4.4MEDIUM

Key Information:

Vendor

WordPress
Status
Mandatory Field
Vendor
CVE Published:
21 March 2026

What is CVE-2026-1278?

The Mandatory Fields plugin for WordPress is susceptible to Stored Cross-Site Scripting (XSS) through its admin settings in all versions up to 1.6.8. This vulnerability arises due to inadequate input sanitization and output escaping, allowing authenticated attackers with administrator-level permissions to inject malicious web scripts. If successfully exploited, these scripts can execute whenever a user accesses a compromised page. Notably, this vulnerability specifically affects multi-site installations and those with unfiltered_html disabled, thereby increasing the risk for site administrators.

Affected Version(s)

Mandatory Field 0 <= 1.6.8

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://downloads.wordpress.org/plugin/mandatory-fields.1...
https://wordpress.org/plugins/mandatory-fields/

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Bhumividh Treloges
.