CVE-2026-77820WPComplete <= 2.9.9.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'empty' Shortcode Attribute
Updated under an hour ago ()
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It affects stellarwp WPComplete. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Sep 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
stellarwp WPComplete stellarwp:wpcomplete (from the name) | through 2.9.9.0 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5b91bb81-b5e4-4a50-833b-e2e98ccc09ff?source=cve
- https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1859
- https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1802
- https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/public/class-wpcomplete-public.php#L1692
- https://plugins.trac.wordpress.org/browser/wpcomplete/tags/2.9.5.7/includes/class-wpcomplete.php#L305
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.