CVE-2023-42344

HIGHNVD 7.37.3—Elevated

7.3

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.

CVSS v3: 7.3
EG Score: 7.3(medium)
EPSS: 93.4%
KEV: Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

References (2)

cve@mitrehttps://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/projectdiscovery/nuclei-templates/issues/8864

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.opencms:opencms-core	10.0.0 ... 9.5.3 (18 versions)	10.5.1	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-611Improper Restriction of XML External Entity Reference (XXE)

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-23 00:07 UTCEG score recompute
2026-05-21 22:41 UTCepss_batch
2026-05-21 22:41 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 22:37 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2023/CVE-2023-42344.yaml
First seen Jan 1, 2023
OpenCMS - XML external entity (XXE)
Open source ↗

Frequently asked(5)

What is CVE-2023-42344?

CVE-2023-42344 is a high vulnerability published on May 8, 2026. 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.

When was CVE-2023-42344 disclosed?

CVE-2023-42344 was first published in the National Vulnerability Database on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-42344 actively exploited?

CVE-2023-42344 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-42344?

CVE-2023-42344 has a CVSS v3 base score of 7.3 (NVD).

How do I remediate CVE-2023-42344?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-42344, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-42344

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CVE-2023-42344

📅 Published

🔄 Last Modified

🔗 References (2)