MaxBoard XSS and File Upload Vulnerability
Priority LOW 37CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution, Cross-site scripting
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434 and CWE-79.
Summary
Insufficient script validation of the admin page enables XSS, which causes unauthorized users to steal admin privileges. When uploading file in a specific menu, the verification of the files is insufficient. It allows remote attackers to upload arbitrary files disguising them as image files.
Why it matters now
EPSS 0.00786 56th percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| No Vendor Information | MaxBoard | up to 1.9.6 | — | No fix listed | CNA |
- MaxBoard VendorNo Vendor Information Affected up to 1.9.6 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-26628
- 2026-10-03 Alias added: GHSA-4hqp-qgvw-892g
References
More Maxboard vulnerabilities
- TI-2021-08351 Maxboard multiple vulnerabilities CVSS 3.1CRITICAL 9.8
- TI-2021-08353 Maxboard Remote Code Execution CVSS 3.1CRITICAL 9.6
- TI-2021-08350 Maxboard SQL injection and LFI vulnerability CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-26628 · CVE Program
- CVE-2021-26628 · NVD
- FIRST EPSS
- GHSA-4hqp-qgvw-892g · GitHub Advisory Database · CC BY 4.0
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