CVE-2021-47931: Exponentcms Exponent CMS

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Exponent CMS 2.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Title and Text Block parameters in the text editing endpoint. Attackers can inject iframe payloads with embedded SVG onload events to execute arbitrary JavaScript. The application also exposes database credentials in responses and lacks brute-force protection on authentication endpoints.

Affected products

• Exponentcms Exponent CMS: up to and including 2.6

Published 2026-05-10. Last modified 2026-07-25.