Security readout for executives and security teams
Plain-English summary
MDwiki 0.6.2 can run attacker-supplied JavaScript when a user opens a specially crafted link. The attacker needs the victim to click or visit the link. Impact is mainly browser-side data exposure or content manipulation within the affected wiki context, not server takeover based on the provided sources.
Executive priority
Treat as a moderate web application risk. It is unlikely to be a server-compromise issue from the available evidence, but it can affect users who trust internal or public wiki links. Prioritize remediation if MDwiki is internet-facing or used by privileged staff.
Technical view
CVE-2017-20239 is a CWE-79 cross-site scripting issue in Dynalon MDwiki 0.6.2. The location hash parameter is parsed and rendered without proper sanitization, enabling arbitrary JavaScript execution in the victim browser. CVSS 3.1 is 6.1: network exploitable, low complexity, no privileges required, user interaction required, changed scope.
Likely exposure
Exposure is limited to environments running MDwiki 0.6.2, especially user-accessible wiki pages. Risk increases if users are likely to follow external links to the wiki. The provided sources do not identify other affected versions or hosted services.
Exploitation context
A public ExploitDB entry exists, so proof-of-concept information is publicly available. The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation in the wild. Exploitation requires user interaction with a crafted URL.
Researcher notes
The source bundle identifies only Dynalon MDwiki 0.6.2. No official patch, fixed version, or workaround is named in the provided sources. Public exploit availability should guide validation priority, but active exploitation is not established by KEV or cited references.
Mitigation direction
- Identify and prioritize any MDwiki 0.6.2 deployments.
- Check MDwiki or Dynalon guidance for fixed versions or official remediation.
- Upgrade, replace, or retire affected MDwiki instances where possible.
- Restrict access to affected wikis until remediation is confirmed.
- Use restrictive Content Security Policy where feasible to reduce script execution impact.
Validation and detection
- Confirm whether MDwiki is deployed and record its version.
- Verify whether any instance is version 0.6.2.
- Review vendor or project advisories for patch availability.
- Use approved security testing to confirm remediation in a controlled environment.
- Monitor user reports of suspicious wiki links or browser pop-ups.
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
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CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2017-20239 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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.
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:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-46097CVE reference · exploit
- VulnCheck Advisory: MDwiki Cross-Site Scripting via Location Hash ParameterCVE reference · third-party-advisory
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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.