TI-2023-23996 Aliases CVE-2023-44766 GHSA-437p-jfm4-2387

A Cross Site Scripting (XSS) vulnerability in Concrete CMS v.9.2.1 allows an attacker to…

LOW 23CWE-79Published 2023-10-06 · Updated 2024-08-02

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

A Cross Site Scripting (XSS) vulnerability in Concrete CMS v.9.2.1 allows an attacker to execute arbitrary code via a crafted script to the SEO - Extra from Page Settings. NOTE: the vendor disputes this because this SEO-related header change can only be made by an admin, and allowing an admin to place JavaScript there is an intentional customization feature.

Why it matters now

EPSS 0.00595 48th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	concrete5/concrete5 (Packagist)	up to 9.2.1	—	No fix listed	GHSA-437p-jfm4-2387

— Vendor— Affected all versions Fixed in — No fix listed CNA
concrete5/concrete5 (Packagist) Vendor— Affected up to 9.2.1 Fixed in — No fix listed GHSA-437p-jfm4-2387

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:concretecms:concrete_cms:9.2.1:::::::*	9.2.1	Vulnerable	Concrete CMS

cpe:2.3:a:concretecms:concrete_cms:9.2.1:*:*:*:*:*:*:* Versions 9.2.1 Vulnerable ·Concrete CMS

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-44766
2026-10-03 Alias added: GHSA-437p-jfm4-2387

References

Exploit 1

https://github.com/sromanhu/ConcreteCMS-Stored-XSS---SEO

Advisory 2

Other 1

https://github.com/concretecms/concretecms

TI-2026-23602 ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager… CVSS 3.1MEDIUM 6.5
TI-2023-23992 A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2… CVSS 3.1MEDIUM 5.4
TI-2023-26495 Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows unauthorized access because… CVSS 3.1CRITICAL 9.8
TI-2026-14907 Missing authorization in Concrete CMS CVSS 4.0HIGH 8.7
TI-2022-06200 Cleartext transmission of sensitive information in https://github.com/concrete5/concrete5 CVSS 3.1CRITICAL 9.8
TI-2021-17294 An issue was discovered in Concrete CMS through 8.5.5. CVSS 3.1CRITICAL 9.8

See all 197 →

Sources

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