Security readout for executives and security teams
Plain-English summary
FlatCore-CMS 2.0.9 is reported to allow cross-site scripting through page metadata and content editing areas. If triggered, attacker-controlled script could run in a victim's browser. The sources do not provide CVSS, patch status, affected CPEs, or active exploitation evidence.
Executive priority
Treat as a focused web application risk, not an emergency based on current evidence. Prioritize inventory and access control review, then remediate confirmed FlatCore-CMS 2.0.9 deployments using vendor guidance.
Technical view
CVE-2021-42245 describes XSS in FlatCore-CMS 2.0.9, specifically in pages.edit.php via meta tags and content sections. The provided record does not state authentication requirements, impact scope, fixed versions, or CWE classification. Exposure depends on who can access or influence those edit fields and where the resulting content is rendered.
Likely exposure
Likely limited to organizations running FlatCore-CMS 2.0.9. Business exposure is higher if non-admin users can edit pages, if admin sessions are high value, or if edited content is viewed by public users. The source bundle does not confirm broader affected versions.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source states active exploitation. A public GitHub issue is referenced, so defenders should assume technical details may be discoverable, but the provided evidence is incomplete.
Researcher notes
The public record is sparse: no CVSS, CWE, CPE, fixed version, or authentication detail is supplied. Analysis should center on pages.edit.php data flow from editable metadata/content into rendered pages and whether output encoding or sanitization is missing.
Mitigation direction
- Identify any FlatCore-CMS 2.0.9 deployments.
- Check the FlatCore project issue and vendor guidance for fixed versions.
- Restrict pages.edit.php access to trusted administrators only.
- Review existing meta tag and content entries for suspicious script-like content.
- Apply any vendor-published fix or upgrade after testing.
Validation and detection
- Confirm deployed FlatCore-CMS versions and administrative exposure.
- Review pages.edit.php handling of meta tags and content sections.
- Verify rendered page output uses safe encoding for editable fields.
- Check recent page-edit history for unexpected changes.
- Run validation in a controlled environment, not 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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-42245 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://github.com/flatCore/flatCore-CMS/issues/69CVE reference · x_refsource_MISC
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.