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TI-2020-07078 Aliases CVE-2020-8821GHSA-2gmj-rvcm-f6j2

An Improper Data Validation Vulnerability exists in Webmin 1.941 and earlier affecting…

Priority MEDIUM 64CWE-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

An Improper Data Validation Vulnerability exists in Webmin 1.941 and earlier affecting the Command Shell Endpoint. A user may enter HTML code into the Command field and submit it. Then, after visiting the Action Logs Menu and displaying logs, the HTML code will be rendered (however, JavaScript is not executed). Changes are kept across users.

Why it matters now

EPSS 0.79056 99th 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*up to 1.941VulnerableWebmin
  • cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:* Versions up to 1.941 Vulnerable ·Webmin

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-8821
  2. 2026-10-03 Alias added: GHSA-2gmj-rvcm-f6j2
  3. 2026-10-06 Priority changed: HIGH → MEDIUM

References

Advisory 1

  • TI-2019-11278 An issue was discovered in Webmin <=1.920. KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-16770 software/apt-lib.pl in Webmin before 1.997 lacks HTML escaping for a UI command. CVSS 3.1CRITICAL 9.8
  • TI-2022-00731 Improper Access Control to Remote Code Execution in webmin/webmin CVSS 3.1HIGH 8.8
  • TI-2019-09619 In Webmin through 1.910, any user authorized to the "Package Updates" module can execute… CVSS 3.0HIGH 8.8
  • TI-2021-11777 Webmin 1.973 is affected by reflected Cross Site Scripting (XSS) to achieve Remote… CVSS 3.1CRITICAL 9.6
  • TI-2024-11888 OS command injection in Webmin CVSS 3.1HIGH 8.8
See all 95 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences