Security readout for executives and security teams
Plain-English summary
CVE-2023-42346 is a high-severity XML External Entity issue in Alkacon OpenCms before version 16. A remote, unauthenticated attacker could cause the server to process an XML DOCTYPE that references an external host, potentially exposing sensitive data. No CISA KEV listing or active exploitation evidence is provided in the sources.
Executive priority
Treat as a priority patching and exposure-review item for any OpenCms deployment. The main business risk is unauthorized disclosure of sensitive server-accessible data. Urgency is lower than known-exploited issues, but the remote unauthenticated CVSS profile warrants timely action.
Technical view
The CVE describes CWE-611 XXE in OpenCms before 16 when a DOCTYPE references an external host. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, high confidentiality impact, no integrity or availability impact stated.
Likely exposure
Organizations running Alkacon OpenCms versions earlier than 16 are the relevant exposure group. Risk is higher where OpenCms is internet-facing or processes XML from untrusted sources. The source bundle does not identify specific vulnerable endpoints or configurations.
Exploitation context
The CVSS vector indicates unauthenticated remote exploitation may be possible without user interaction. The documented impact is confidentiality loss. The sources do not show KEV status, confirmed exploitation in the wild, or public weaponized exploit details.
Researcher notes
Evidence is sparse: the CVE affected-product fields are not populated, but the description states OpenCms before 16. Avoid assuming affected endpoints beyond the XXE condition described. Use the watchTowr write-up and official CVE record to guide deeper validation without relying on unverified exploit claims.
Mitigation direction
- Inventory Alkacon OpenCms deployments and identify versions below 16.
- Upgrade to OpenCms 16 or later where vendor guidance confirms remediation.
- Review Alkacon advisories and the cited research for current vendor instructions.
- Restrict untrusted XML processing where possible until upgraded.
- Monitor egress controls for unexpected external entity resolution attempts.
Validation and detection
- Confirm OpenCms version on all production, staging, and exposed systems.
- Verify whether affected systems accept or process XML from untrusted users.
- Check vendor release notes for the fix associated with version 16.
- Review logs for unusual outbound requests from OpenCms servers.
- Confirm compensating controls block unnecessary server-side outbound connections.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-611: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-42346 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/CVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of XML External Entity Reference
Improper Restriction of XML External Entity Reference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.