CVE-2021-47931
MEDIUM EPSS 11.6%
Published May 10, 20261mo ago · Modified Jun 17, 20262w ago
5.1 CVSS 4.0
Published May 10, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
11.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-79 Cross-site Scripting Injection
References 3
- exploit-db.com https://www.exploit-db.com/exploits/50611
- exponentcms.org https://www.exponentcms.org/
- vulncheck.com https://www.vulncheck.com/advisories/exponent-cms-multiple-vulnerabilities-stored-xss-authentication
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.