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Concrete Cms CVE-2022-43689

MEDIUM
Improper Restriction of XML External Entity Reference (CWE-611)
2022-11-14 cve@mitre.org
XXE Concrete Cms Concretecms
5.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-611
OWASP Top 10:2025
A02:2025 - Security Misconfiguration
ASVS 5.0
V13 - Configuration XML external entity prevention
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

A remote attacker could read arbitrary files or perform SSRF through XML processing by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.6% exploitation probability (EPSS)

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AnalysisAI

Concrete CMS (formerly concrete5) below 8.5.10 and between 9.0.0 and 9.1.2 is vulnerable to XXE based DNS requests leading to IP disclosure. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Disable external entity processing in XML parsers, use JSON instead of XML where possible.

Affected Packages

composer concrete5/concrete5 fix: 8.5.10, 9.1.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in composer

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

This vulnerability is classified as XML External Entity (XXE) (CWE-611), which allows attackers to read arbitrary files or perform SSRF through XML processing. Concrete CMS (formerly concrete5) below 8.5.10 and between 9.0.0 and 9.1.2 is vulnerable to XXE based DNS requests leading to IP disclosure. Affected products include: Concretecms Concrete Cms.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionNVD

Concrete CMS (formerly concrete5) below 8.5.10 and between 9.0.0 and 9.1.2 is vulnerable to XXE based DNS requests leading to IP disclosure.

Threat Intelligence Overview

EPSS Score
0.6%
Top 53% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.6%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

XML External Entity Injection HIGH

XML External Entity (XXE) attacks exploit XML parsers that process Document Type Definitions (DTDs) without proper restrictions.

Affected Products (CPE)NVD

cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*
cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*

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Unauthenticated user enumeration in Concrete CMS 9.0.0 through 9.5.2 allows any anonymous visitor to dump the complete b
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A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Co
CVE-2021-36766 HIGH POC
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CVE-2020-24986 HIGH POC
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Concrete5 up to and including 8.5.2 allows Unrestricted Upload of File with Dangerous Type such as a .php file via File

CVE-2020-11476 HIGH POC
7.2 Jul 28

Concrete5 before 8.5.3 allows Unrestricted Upload of File with Dangerous Type such as a .phar file. Rated high severity

CVE-2018-13790 HIGH POC
7.2 Jul 09

A Server Side Request Forgery (SSRF) vulnerability in tools/files/importers/remote.php in concrete5 8.2.0 can lead to at
CVE-2026-6826 MEDIUM POC
6.9 May 21

Unauthenticated file usage disclosure in Concrete CMS 9.5.0 and below exposes internal page structure to any network-acc
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concrete5 8.1.0 places incorrect trust in the HTTP Host header during caching, if the administrator did not define a "ca
CVE-2026-2994 MEDIUM POC
6.8 Mar 04

Concrete CMS versions below 9.4.8 contain a cross-site request forgery vulnerability in the Anti-Spam Allowlist Group Co
CVE-2017-8082 MEDIUM POC
6.5 Apr 24

concrete5 8.1.0 has CSRF in Thumbnail Editor in the File Manager, which allows remote attackers to disable the entire in
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Unauthenticated information disclosure in Concrete CMS 9.5.0 and earlier allows remote attackers to enumerate all conver
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Unauthenticated information disclosure in Concrete CMS 9.5.0 and below allows any network-accessible attacker to enumera

Same weakness CWE-611 – Improper Restriction of XML External Entity Reference

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CVE-2017-12629 CRITICAL POC
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CVE-2016-9563 MEDIUM POC
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CVE-2012-3363 CRITICAL POC
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CVE-2016-4264 HIGH POC
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Same technique XXE

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CVE-2013-5014 HIGH POC
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CVE-2015-0923 MEDIUM POC
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References

Advisories & patches
ADVISORY https://documentation.concretecms.org/developers/introduction/version-history/8510-release-notes ADVISORY https://documentation.concretecms.org/developers/introduction/version-history/913-release-notes ADVISORY https://github.com/concretecms/concretecms/releases/8.5.10 ADVISORY https://github.com/concretecms/concretecms/releases/9.1.3 ADVISORY https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2022-10-31

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