CVE-2024-4353Network attack vector

Stored XSS via unescaped board instance names

Published Aug 1, 2024 · Updated Jan 17, 2025

Stored XSS in Concrete CMS 9.0.0 through 9.3.2 allows remote authenticated users to execute JavaScript via a board instance name. Dashboard board-instance views render the stored name without HTML escaping; the patch wraps those outputs in h(). Administrator access is required to save the name, and another user's interaction exposes browser-accessible data and actions to the injected script.

CVSS severity4.6
Medium
EPSS probability0.30%
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 9.0.0 through 9.3.2 allows remote authenticated users to execute JavaScript via a board instance name. Dashboard board-instance views render the stored name without HTML escaping; the patch wraps those outputs in h(). Administrator access is required to save the name, and another user's interaction exposes browser-accessible data and actions to the injected script.

The record

CVE
CVE-2024-4353
Published
Aug 1, 2024
Updated
Jan 17, 2025
Vendor
Concrete CMS
Product
Concrete CMS
Classifications
T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0.0 <=9.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Concrete CMS · Concrete CMSversion=9.0.0 <=9.3.2

Published CVSS scores

3.1Concrete CMSCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N
4.6Concrete CMSCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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