Security readout for executives and security teams
Plain-English summary
CVE-2018-19201 is a reflected cross-site scripting issue in MyBB before 1.8.20. An attacker could inject JavaScript through the username parameter in the ModCP Profile Editor, potentially affecting users who load a maliciously crafted request in that interface.
Executive priority
Treat this as a moderate web application risk. It is not documented as actively exploited, but public forums often have broad exposure and XSS against privileged users can affect account trust and site integrity.
Technical view
The source bundle describes reflected XSS in MyBB's ModCP Profile Editor before version 1.8.20, involving unsanitized or improperly encoded handling of the username parameter. No CVSS, CWE, or detailed product CPE data is provided.
Likely exposure
Exposure is most likely on internet-facing MyBB forum installations running versions before 1.8.20, especially where moderator control panel profile editing is available to authenticated moderator or administrative users.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. Reflected XSS generally requires a targeted user to open a crafted request, but the bundle does not confirm prerequisites beyond remote attacker capability.
Researcher notes
Evidence is limited to the CVE description and MyBB security references. The bundle names the affected parameter and version boundary, but does not provide CVSS, CWE classification, exploit details, or a separate workaround.
Mitigation direction
- Upgrade MyBB installations to version 1.8.20 or later.
- Review MyBB vendor release notes and security guidance for related fixes.
- Restrict moderator control panel access to trusted users only.
- Monitor for suspicious ModCP profile editor requests.
- Prioritize remediation on public forums with active moderator usage.
Validation and detection
- Inventory all MyBB deployments and confirm their exact versions.
- Identify any installations running MyBB before 1.8.20.
- Review access controls for the ModCP Profile Editor.
- Check web logs for unusual username parameter content in ModCP requests.
- Confirm the vendor security update is applied in production.
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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CVE-2018-19201 mapping review
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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://blog.mybb.com/2019/02/27/mybb-1-8-20-released-security-maintenance-release/CVE reference · x_refsource_CONFIRM
- https://github.com/mybb/mybb/blob/feature/SECURITY.md#technical-details-of-known-issuesCVE 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.