Security readout for executives and security teams
Plain-English summary
Eyoucms v1.4.1 has a stored XSS issue in the web_copyright setting. An authenticated user could save malicious web content that later executes in a browser. Business risk depends on who can edit that setting and who views the affected pages.
Executive priority
Prioritize remediation if Eyoucms v1.4.1 is internet-facing or has many content editors. Lower urgency if the setting is restricted to a small trusted admin group and no suspicious changes exist.
Technical view
CVE-2020-21929 describes stored cross-site scripting in the web_copyright field of Eyoucms v1.4.1. The CVE says authenticated attackers can execute arbitrary web scripts or HTML. No CVSS score, CWE, patch version, or detailed affected CPE is provided in the bundle.
Likely exposure
Exposure is likely limited to organizations running Eyoucms v1.4.1 where authenticated users can modify site configuration fields, especially web_copyright. Public exposure depends on whether stored content renders to visitors or administrators.
Exploitation context
The source bundle does not indicate CISA KEV listing or active exploitation. The issue requires authentication according to the CVE description, but stored XSS can persist and affect later viewers once malicious content is saved.
Researcher notes
Evidence is sparse: the CVE record names Eyoucms v1.4.1 and the web_copyright field, but provides no CVSS, CWE, patch reference, or exploit-status detail. Treat version and field validation as the first research tasks.
Mitigation direction
- Check Eyoucms vendor guidance for fixed versions or official remediation.
- Restrict access to site configuration and copyright fields to trusted administrators.
- Review and remove suspicious HTML or script content from web_copyright.
- Apply output encoding and input sanitization if maintaining a custom fork.
- Monitor admin account activity for unauthorized configuration changes.
Validation and detection
- Inventory Eyoucms deployments and confirm whether v1.4.1 is running.
- Identify who can edit web_copyright or equivalent site settings.
- Review rendered pages to confirm the field is encoded safely.
- Check admin audit logs for unexpected copyright field changes.
- Use a harmless marker string to validate storage and rendering behavior.
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-2020-21929 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/eyoucms/eyoucms/issues/8CVE 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.