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CVE-2026-8853

MEDIUM 4.4 CVSS 3.1
Published
June 10, 2026
Last modified
July 23, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Description

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • websoudan MW WP Form — Up to and including 5.1.3

References

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