Stored Cross-Site Scripting Vulnerability in WPComplete Plugin for WordPress
CVE-2026-77820

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
WPcomplete
Vendor
CVE Published:
19 September 2026

What is CVE-2026-77820?

The WPComplete plugin for WordPress is susceptible to Stored Cross-Site Scripting due to inadequate input sanitization and output escaping. This vulnerability affects all versions up to and including 2.9.9.0. Authenticated attackers with contributor-level access or higher can exploit this flaw by injecting malicious scripts through the 'empty' Shortcode Attribute. The injected scripts execute when users access the compromised pages, posing a significant security risk. This issue specifically impacts the premium version of the plugin.

Affected Version(s)

WPComplete 0 <= 2.9.9.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/wpcomplete/tag...
https://plugins.trac.wordpress.org/browser/wpcomplete/tag...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.