Security readout for executives and security teams
Plain-English summary
This CVE affects older Contao CMS releases and is described as an incorrect access control issue. In business terms, access rules may not be enforced as intended. The provided sources do not state the exact data, function, or user role affected, so urgency depends on whether exposed Contao installations remain on vulnerable versions.
Executive priority
Prioritize remediation if Contao is internet-facing, handles sensitive content, or supports privileged workflows. Because source evidence lacks severity and impact detail, this should be handled as a targeted upgrade and exposure-confirmation task rather than an emergency unless local context increases risk.
Technical view
CVE-2018-20028 covers Contao 3.x before 3.5.37, 4.4.x before 4.4.31, and 4.6.x before 4.6.11. The only stated weakness is Incorrect Access Control. The source bundle provides no CVSS, CWE, affected component detail, exploit prerequisites, or impact description beyond version ranges.
Likely exposure
Exposure is limited to organizations running Contao CMS on affected branches: 3.x below 3.5.37, 4.4.x below 4.4.31, or 4.6.x below 4.6.11. The sources do not identify affected configurations, authentication state, or whether internet exposure is required.
Exploitation context
The provided bundle does not show CISA KEV listing, active exploitation, public exploit evidence, or exploit mechanics. Treat this as a version-based access control risk until vendor guidance or internal testing clarifies impact.
Researcher notes
Evidence is sparse. The CVE record and Contao references identify affected version ranges and an access control class, but not the vulnerable endpoint, authorization boundary, exploitability, or post-fix behavior. Avoid assuming impact beyond incorrect access control without vendor advisory details or controlled validation.
Mitigation direction
- Inventory all Contao installations and record exact versions.
- Upgrade affected 3.x systems to 3.5.37 or later.
- Upgrade affected 4.4.x systems to 4.4.31 or later.
- Upgrade affected 4.6.x systems to 4.6.11 or later.
- Review Contao vendor advisory for branch-specific guidance.
Validation and detection
- Confirm no production Contao version is below the fixed release for its branch.
- Check externally reachable sites for Contao CMS presence and version evidence.
- Verify upgrade completion in application metadata or deployment records.
- Review access-control-sensitive logs for unexplained privileged actions.
- Document any unsupported Contao branches for risk acceptance or retirement.
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.
CVE-2018-20028 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://contao.org/en/news.htmlCVE reference · x_refsource_CONFIRM
- https://contao.org/en/news/security-vulnerability-cve-2018-20028.htmlCVE reference · x_refsource_CONFIRM
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.