Is CVE-2026-8853 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-8853 being exploited in the wild.

How severe is CVE-2026-8853?

Medium severity, with a CVSS score of 4.4, published 10 June 2026.

Which products and versions are affected?

MW WP Form MW WP Form Up to and including 5.1.3.

Is there a fix for CVE-2026-8853?

A patch was published on 2026-06-10: Version 5.1.4 released to address the vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-8853 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-8853?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-8853: MW WP Form Stored XSS in memo parameter

CVE-2026-8853 · Severity: medium · CVSS 4.4 · Published 2026-06-10

The MW WP Form plugin for WordPress, which is used to create and manage contact forms, contains a security flaw that allows authorized users with editor-level access to inject malicious scripts into the website. These scripts execute automatically when other users visit the affected pages, potentially leading to unauthorized actions or data theft. This issue occurs because the plugin does not properly clean certain text fields before saving them to the database.

Quick answers

Is CVE-2026-8853 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-8853 being exploited in the wild.
How severe is CVE-2026-8853?: Medium severity, with a CVSS score of 4.4, published 10 June 2026.
Which products and versions are affected?: MW WP Form MW WP Form Up to and including 5.1.3.
Is there a fix for CVE-2026-8853?: A patch was published on 2026-06-10: Version 5.1.4 released to address the vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-8853 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-8853?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'memo' parameter in versions up to and including 5.1.3. The vulnerability exists because the plugin uses update_post_meta() to store the 'memo' value instead of wp_insert_post(), which bypasses WordPress's built-in kses and unfiltered_html security filters. An authenticated attacker with editor-level permissions or higher can inject arbitrary web scripts by breaking out of the textarea element using closing tags. These scripts then execute in the context of any user accessing the contact data detail page. The issue has been addressed in version 5.1.4.

Affected products

MW WP Form MW WP Form Up to and including 5.1.3

Timeline

2026-06-10: advisory: NVD published the vulnerability details.
2026-06-10: disclosed: Wordfence published the vulnerability report.
2026-06-10: patched: Version 5.1.4 released to address the vulnerability.

References

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