CVE-2026-125392
Deferred Deferred - Pending Action

Stored XSS in Webmin DNS Record Editing

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: VulnCheck

Description
Webmin through 2.670 contains a stored cross-site scripting vulnerability in bind8/edit_recs.cgi that outputs raw DNS record values without HTML escaping in ALL view mode. Delegated zone users such as Virtualmin domain owners can store record values containing script that executes in an administrator's browser when viewing zone records.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-125392
EUVD
EUVD-2026-120555

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
webmin webmin From 0 (inc) to 2.670 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

Webmin versions up to 2.670 have a stored cross-site scripting (XSS) flaw in bind8/edit_recs.cgi. When viewing DNS records in ALL mode, user-supplied record values are displayed without HTML escaping. This allows delegated zone users, like Virtualmin domain owners, to inject malicious scripts that execute in an administrator's browser when they view the records.

Detection Guidance

Check Webmin version with 'dpkg -l webmin' or 'rpm -qa webmin'. If version is 2.670 or lower, the system is vulnerable. Inspect bind8/edit_recs.cgi for stored XSS in ALL view mode. Look for DNS records containing script tags in zone configurations.

Impact Analysis

An attacker with delegated access could steal session cookies, perform actions on behalf of the admin, or deface the Webmin interface. Administrators viewing affected records risk compromise of their browser session or credentials.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling unauthorized script execution in administrative browsers. Stored XSS may allow attackers to steal session cookies or sensitive data, violating confidentiality requirements under these regulations. However, the specific impact depends on how the affected Webmin instance is deployed and what data it manages.

Mitigation Strategies

Upgrade Webmin to version 2.671 or higher immediately. Remove or sanitize any malicious DNS records containing script code. Restrict access to bind8/edit_recs.cgi for non-admin users. Monitor zone records for unauthorized changes.

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