CVE-2023-44766Public exploitNetwork attack vector

Admin-only stored script execution via SEO field

Published Oct 6, 2023 · Updated Aug 2, 2024

Stored XSS in Concrete CMS 9.2.1 allows remote authenticated users with administrator access to execute JavaScript in site pages. The reported mechanism stores script markup from the SEO Header Extra Content field and renders it into pages, but the vendor identifies that behavior as the field's intended purpose. Only administrators or accounts granted the relevant advanced permission can modify the field, so the vendor disputes that the behavior constitutes a vulnerability.

CVSS severity4.8
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Concrete CMS 9.2.1 allows remote authenticated users with administrator access to execute JavaScript in site pages. The reported mechanism stores script markup from the SEO Header Extra Content field and renders it into pages, but the vendor identifies that behavior as the field's intended purpose. Only administrators or accounts granted the relevant advanced permission can modify the field, so the vendor disputes that the behavior constitutes a vulnerability.

The record

CVE
CVE-2023-44766
Published
Oct 6, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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