Cross-Site Scripting Vulnerability in Webmin Mailbox Component
CVE-2026-49102

6.1MEDIUM

Key Information:

Vendor

Webmin

Status
Webmin
Vendor
CVE Published:
27 May 2026

What is CVE-2026-49102?

Webmin versions prior to 2.640 contain a Cross-Site Scripting (XSS) vulnerability in the mailboxes component. This issue arises when SVG document attachments are viewed, as the application uses the image/svg+xml MIME type instead of a safer alternative like text/plain. Attackers can exploit this flaw to inject malicious scripts, compromising user data and security. Webmin users are encouraged to update to the latest version to mitigate this vulnerability.

Affected Version(s)

Webmin 0 < 2.640

References

https://github.com/webmin/webmin/compare/2.630...2.640
https://github.com/webmin/webmin/commit/cf432879a14568c4b...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.