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CVE-2026-83625

HIGH 7.2 CVSS 3.1
Published
September 5, 2026
Last modified
September 8, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The Contact Form by Supsystic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via IP Address Header in all versions up to, and including, 1.10.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. An unauthenticated attacker can first call the 'updateNonce' action — which is accessible without authentication due to its absence from the plugin's permission list — to obtain a valid nonce, then submit a contact form with a malicious payload in a spoofed IP header such as X-Forwarded-For.

Affected WordPress components

  • Contact Form by Supsystic Plugin · contact-form-by-supsystic
    Confirmed match Active
    Up to and including 1.10.2
    View on WordPress.org

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

  • supsysticcom Contact Form by Supsystic — Up to and including 1.10.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/classes/utils.php#L77
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/controller.php#L390
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/controller.php#L411
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/js/admin.forms.contacts.list.js#L204
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/models/forms.php#L103
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/classes/utils.php#L77
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/controller.php#L390
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/controller.php#L411
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/js/admin.forms.contacts.list.js#L204
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/models/forms.php#L103
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3679442%40contact-form-by-supsystic&new=3679442%40contact-form-by-supsystic
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/aa65bced-a449-4ba5-accf-40a824ee464d?source=cve
  • nvd.nist.gov Official NVD record