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.
History

Mon, 07 Sep 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 05 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Supsysticcom
Supsysticcom contact Form By Supsystic
Wordpress
Wordpress wordpress
Vendors & Products Supsysticcom
Supsysticcom contact Form By Supsystic
Wordpress
Wordpress wordpress

Sat, 05 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
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.
Title Contact Form by Supsystic <= 1.10.2 - Unauthenticated Stored Cross-Site Scripting via IP Address Header
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-09-05T07:38:14.659Z

Updated: 2026-09-07T11:17:24.649Z

Reserved: 2026-08-31T20:49:46.226Z

Link: CVE-2026-83625

cve-icon Vulnrichment

Updated: 2026-09-07T11:13:51.044Z

cve-icon NVD

Status : Deferred

Published: 2026-09-05T08:16:40.857

Modified: 2026-09-08T13:12:58.310

Link: CVE-2026-83625

cve-icon Redhat

No data.