XYHCMS v3.6 contains a stored cross-site scripting (XSS) vulnerability in the component xyhai.php?s=/Link/index.
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
XYHCMS v3.6 contains a stored cross-site scripting (XSS) vulnerability in the component xyhai.php?s=/Link/index.
Why it matters now
EPSS 0.0045 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-21656
- 2026-10-03 Alias added: GHSA-55xc-mp8m-rgvj
References
More Xyhcms vulnerabilities
- TI-2018-10451 xyhai.php?s=/Auth/addUser in XYHCMS 3.5 allows CSRF to add a background administrator account. CVSS 3.0HIGH 8.8
- TI-2020-13878 A cross site request forgery (CSRF) vulnerability in the /xyhai.php?s=/Auth/editUser URI… CVSS 3.1MEDIUM 4.5
Sources
- CVE-2020-21656 · CVE Program
- CVE-2020-21656 · NVD
- FIRST EPSS
- GHSA-55xc-mp8m-rgvj · GitHub Advisory Database · CC BY 4.0
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