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MEDIUM severity

CVE-2023-44762 — concrete5

MEDIUM

CVE-2023-44762 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in concrete5/concrete5. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

ConcreteCMS Cross-site Scripting vulnerability

Also known asGHSA-6fm3-r6mf-j875
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-44762.

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk+0.04%
Lower risk than most CVEs50th percentile — riskier than 50% of all scored CVEsHighest risk
0.00%0.38%0.75%1.13%0.2%0.6%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘concrete5/concrete5

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2 allows an attacker to execute arbitrary code via a crafted script to the Tags from Settings - Tags.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistconcrete5/concrete5all versionsNo fix

Affected Products

1 product · 1 configurations
Application
concrete cmsconcretecms
1 version
9.2.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions…

github.comNVDOct 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for concrete5/concrete5, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of concrete5/concrete5 for CVE-2023-44762. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2 allows an attacker to execute arbitrary code via a crafted script to the Tags from Settings - Tags.
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CVE-2023-44762: concrete5 RCE (Medium 5.4)