Security readout for executives and security teams
Plain-English summary
CVE-2021-20749 is a cross-site scripting issue in nendeb's Fudousan WordPress plugin series version 5.7.0 and earlier. An authenticated remote user could inject script through unspecified vectors. The public record does not provide CVSS scoring, detailed attack conditions, or confirmed exploitation.
Executive priority
Treat this as a near-term remediation item for public WordPress sites using the affected plugin. It is not KEV-listed, but authenticated XSS can still create account, data, or trust risks on customer-facing sites.
Technical view
The issue affects Fudousan plugin, Fudousan Plugin Pro Single-User Type, and Pro Multi-User Type through version 5.7.0. The vulnerability class is XSS, requiring remote authenticated access. The vulnerable input path is not specified in the provided sources, limiting validation detail.
Likely exposure
Exposure is most likely on WordPress sites using the affected Fudousan real-estate plugin series at version 5.7.0 or earlier, especially where non-admin authenticated users can access plugin workflows.
Exploitation context
The sources describe authenticated remote script injection but do not state active exploitation. CVE data indicates it is not listed in KEV. Business impact depends on who can inject content and which users later view it.
Researcher notes
The public sources omit the specific vectors, CVSS metrics, CWE mapping, and fixed version detail in the provided bundle. Avoid assuming unauthenticated reachability or active exploitation. Focus validation on version exposure, authenticated role access, and vendor remediation tracking.
Mitigation direction
- Inventory WordPress sites for affected Fudousan plugin variants.
- Check installed versions against 5.7.0 and earlier.
- Review nendeb and JVN guidance for fixed release information.
- Upgrade or disable affected plugin deployments according to vendor guidance.
- Restrict plugin access to trusted users until remediated.
Validation and detection
- Confirm plugin name and version from WordPress administration or asset inventory.
- Identify sites running Fudousan plugin series version 5.7.0 or earlier.
- Review authenticated user roles allowed to use plugin features.
- Check vendor and JVN pages for remediation details.
- Inspect logs for unusual authenticated content changes or script-like stored content.
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-2021-20749 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://nendeb.jp/fudouCVE reference · x_refsource_MISC
- https://www.nendeb-biz.jp/2021-0617-1200/CVE reference · x_refsource_MISC
- https://jvn.jp/en/jp/JVN93799513/index.htmlCVE 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.