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TI-2021-22544 Aliases CVE-2021-47931GHSA-6jxm-mv8c-gh34

Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00213 11th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ExponentcmsExponent CMSup to 2.6—No fix listedCNA
  • Exponent CMS VendorExponentcms Affected up to 2.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47931
  2. 2026-10-03 Alias added: GHSA-6jxm-mv8c-gh34

References

Exploit 1

Other 1

  • TI-2016-02037 Exponent CMS 2.x before 2.3.7 Patch 3 allows remote attackers to execute arbitrary code… CVSS 3.0CRITICAL 9.8
  • TI-2016-06302 Multiple SQL injection vulnerabilities in Exponent CMS before 2.4.0 allow remote… CVSS 3.0CRITICAL 9.8
  • TI-2016-06543 Exponent CMS 2.3.9 suffers from a remote code execution vulnerability in… CVSS 3.0CRITICAL 9.8
  • TI-2016-06542 Exponent CMS 2.3.9 suffers from a remote code execution vulnerability in… CVSS 3.0CRITICAL 9.8
  • TI-2016-07387 SQL injection vulnerability in framework/modules/help/controllers/helpController.php in… CVSS 3.0CRITICAL 9.8
  • TI-2016-07386 SQL injection vulnerability in the activate_address function in… CVSS 3.0CRITICAL 9.8
See all 60 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences