CVE-2026-77820
WPComplete <= 2.9.9.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'empty' Shortcode Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The WPComplete plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'empty' Shortcode Attribute in all versions up to, and including, 2.9.9.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the premium version of the software in order to exploit. Please note this only affects the pro version.
| CWE | CWE-79 |
| Vendor | stellarwp |
| Product | wpcomplete |
| Published | Sep 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
stellarwp / WPComplete
0 ≤ 2.9.9.0
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/5b91bb81-b5e4-4a50-833b-e2e98ccc09ff?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1859 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1802 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1692 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/includes/class-wpcomplete.php#L305
Credits
Wordfence PRISM