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Vulnerabilities

Vulnerability · CVE-2023-42344

Alkacon OpenCms before 10.5.1 allows remote unauthenticated attackers to obtain sensitive information via a cmis-online/query XXE attack on a Chemistry servlet.

Published Apr 2, 2024 · catalog updated Jun 17, 2026 · Alkacon Software OpenCMS

Patch now

CVE-2023-42344 is in the CISA known-exploited catalog. Confirm Alkacon Software OpenCMS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.3
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
2.23%
Remediation
Remediation guidance
Affected products
vendor Alkacon Software OpenCMS

Alkacon OpenCms before 10.5.1 allows remote unauthenticated attackers to obtain sensitive information via a cmis-online/query XXE attack on a Chemistry servlet.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Alkacon Software OpenCMSversion unspecified

How to fix CVE-2023-42344

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-42344 is in the CISA known-exploited catalog. Confirm Alkacon Software OpenCMS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-611: XML External Entity (XXE). EPSS 2.23%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 2, 2024 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  2. May 8, 2026 · NIST NVD

    Detected

    Alkacon OpenCms before 10.5.1 allows remote unauthenticated attackers to obtain sensitive information via a cmis-online/query XXE attack on a Chemistry servlet.

  3. Jun 17, 2026 · NIST NVD

    Updated

    Alkacon OpenCms before 10.5.1 allows remote unauthenticated attackers to obtain sensitive information via a cmis-online/query XXE attack on a Chemistry servlet.

Sources

  • CVE.orgVulnerability recordCVE-2023-42344

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-42344

    30-day exploitation probability 2.2%

    first.org
  • NIST NVDVulnerability recordCVE-2023-42344

    Alkacon OpenCms before 10.5.1 allows remote unauthenticated attackers to obtain sensitive information via a cmis-online/query XXE attack on a Chemistry servlet.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2023-42344

    OpenCMS is vulnerable to an unauthenticated external entity vulnerability that could allow for code execution via malicious requests to the OpenCMS server.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.