CVE-2021-47931CWE-79

Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication

Medium · published May 10, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
11.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00213 · 11.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-10T12:43Z
EPSS history
Timeline
  • 10 MAY 12:43Z
    Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication
    cvelistv5