CVE-2026-83625Contact Form by Supsystic <= 1.10.2 - Unauthenticated Stored Cross-Site Scripting via IP Address Header
Updated under an hour ago ()
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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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/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 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
supsysticcom Contact Form by Supsystic supsysticcom:contact_form_by_supsystic (from the name) | through 1.10.2 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/aa65bced-a449-4ba5-accf-40a824ee464d?source=cve
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/js/admin.forms.contacts.list.js#L204
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/classes/utils.php#L77
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/models/forms.php#L103
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/controller.php#L411
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.10.2/modules/forms/controller.php#L390
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/js/admin.forms.contacts.list.js#L204
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/classes/utils.php#L77
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/models/forms.php#L103
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/controller.php#L411
- https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.8.1/modules/forms/controller.php#L390
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3679442%40contact-form-by-supsystic&new=3679442%40contact-form-by-supsystic
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.