Threat intelligence

Contact Form by Supsystic < 1.10.0 - Unauthenticated Stored Cross-Site Scripting

CVE-2026-73378 · contact-form-by-supsystic

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Contact Form By Supsystic at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Contact Form by Supsystic < 1.10.0 - Unauthenticated Stored Cross-Site Scripting
Affected software: contact-form-by-supsystic(Plugin)
Affected versions: < 1.10.0
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-73378
Published: 18 August 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 59833e1f-abb5-453d-ac8d-352ebe0f11df). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Contact Form By Supsystic version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Contact Form By Supsystic advisoriesBack to catalog