CVE-2022-43556Network attack vector

Reflected XSS via unsanitized dashboard result output

Published Dec 5, 2022 · Updated Apr 24, 2025

Reflected XSS in Concrete CMS before 8.5.10 and 9.0.0 through 9.1.2 allows remote attackers to execute script via dashboard input. The result-dashboard template renders a text-field value into HTML without output encoding, so attacker-supplied markup is interpreted by the browser. Exploitation requires a victim to open the crafted dashboard result page; script execution can read or alter data available to that browser session.

CVSS severity4.2
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Concrete CMS before 8.5.10 and 9.0.0 through 9.1.2 allows remote attackers to execute script via dashboard input. The result-dashboard template renders a text-field value into HTML without output encoding, so attacker-supplied markup is interpreted by the browser. Exploitation requires a victim to open the crafted dashboard result page; script execution can read or alter data available to that browser session.

The record

CVE
CVE-2022-43556
Published
Dec 5, 2022
Updated
Apr 24, 2025
Vendor
Concrete CMS
Product
Concrete CMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=Fixed in Concrete CMS 8.5.10 and Concrete CMS 9.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Concrete CMS · Concrete CMSversion=Fixed in Concrete CMS 8.5.10 and Concrete CMS 9.1.3

Published CVSS scores

4.2Concrete CMS security teamCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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