Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.
Priority HIGH 72CWE-611Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-611 and the CVSS impact.
Summary
Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00232 14th percentileScored 2026-11-07
Fix Fixed org.opencms:opencms-core (Maven): 16.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | org.opencms:opencms-core (Maven) | before 16.0 | 16.0 | Patch available | GHSA-pj6p-9p8x-5mfc |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- org.opencms:opencms-core (Maven) Vendor— Affected before 16.0 Fixed in 16.0 Patch available GHSA-pj6p-9p8x-5mfc
Remediation
- Fix · GHSA-pj6p-9p8x-5mfc org.opencms:opencms-core (Maven) Fixed in 16.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-42346
- 2026-10-03 Alias added: GHSA-pj6p-9p8x-5mfc
References
Sources
- CVE-2023-42346 · CVE Program
- CVE-2023-42346 · NVD
- FIRST EPSS
- GHSA-pj6p-9p8x-5mfc · GitHub Advisory Database · CC BY 4.0
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