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CVE-2021-47931

Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication

Published: May 10, 2026Updated: May 26, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
6.4CVSSMEDIUM
EPSS Score
0.2%
Top 88.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Exponent CMSExponentcms
On-premWeb App
Web & CMS Plugins / cms-core
exponentcmsoss-projectWeb & CMS Pluginsaka exponent cms, exponentcms

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://www.exploit-db.com/exploits/50611
exploit-db.com
https://www.exponentcms.org/
exponentcms.org
https://www.vulncheck.com/advisories/exponent-cms-multiple-vulnerabilities-stored-xss-authentication
vulncheck.com

Timeline

Published
May 10, 2026
Last Updated
May 26, 2026

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