PT-2026-48393 · Websoudan · Mw Wp Form

Sérgio Charruadas · Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-8853

NVD

CVSS v3.1

4.4

Medium

Base vector

AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'memo' parameter in all versions up to, and including, 5.1.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Because the memo value is stored via update post meta() rather than wp insert post(), WordPress's built-in kses and unfiltered html protections do not apply, allowing attackers to break out of the textarea element via injected closing tags regardless of role-based content filtering.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-8853

Affected Products

Mw Wp Form

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-8853 · Security Note
• https://plugins.trac.wordpress.org/changeset?old_path=mw-wp-form/tags/5.1.3&new_path=mw-wp-form/tags/5.1.4 · Note
• https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.0/classes/controllers/class.contact-data.php#L134 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/2a6dfdec-c1c6-4300-ab0a-9fd1c550d09f?source=cve · Note
• https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.0/templates/contact-data/detail.php#L77 · Note
• https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.3/classes/controllers/class.contact-data.php#L134 · Note
• https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.3/templates/contact-data/detail.php#L77 · Note