CVE-2026-102337
MediumCVSS 4.9Summary
In Webmin prior to 2.652, untrusted users with access to the File Manager or Upload and Download modules can direct Webmin's server-side URL download functionality to non-public network addresses because download destinations are not restricted by resolved IP address. This allows requests to unauthenticated intranet services or cloud-provider instance metadata endpoints inaccessible from the user's own system.
Risk Assessment
Enables access to internal services and cloud metadata, potentially leading to disclosure of credentials or configuration. It is an SSRF vector from the Webmin server.
Recommendation
Update Webmin to version 2.652, which contains the fix. Until updated, restrict access to File Manager and Upload and Download modules and block outbound traffic to private addresses and metadata endpoints.
Other vulnerabilities in Webmin
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- CVE-2017-15644High
There is an SSRF vulnerability in Webmin 1.850 that allows an attacker to exploit the PATH_INFO parameter to make a GET request to tunnel/link.cgi with an external IP address.
- CVE-2026-49243Critical
Webmin before version 2.650 contains an XSS vulnerability that can be exploited when a user clicks a malicious link to their server. An attacker can execute arbitrary commands in the user's context.
- CVE-2019-15107CriticalActively exploited
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- CVE-2026-42210Medium
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- CVE-2026-56022Medium
Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.
- CVE-2026-56021Medium
Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.
- CVE-2026-56020High
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- CVE-2026-22678Medium
Webmin before 2.641 contains a stored cross-site scripting vulnerability in the email template description field of the System and Server Status module. Low-privileged authenticated attackers can execute arbitrary JavaScript in the browser context of administrators by injecting unsanitized input stored in save_tmpl.cgi and rendered unescaped in list_tmpls.cgi.
- CVE-2023-40983Medium
A reflected cross-site scripting (XSS) vulnerability exists in the File Manager function of Webmin v2.100. It allows attackers to execute malicious scripts by injecting a crafted payload into the 'Find in Results' file.
Original NVD description (English source)
Webmin is a web-based system administration tool for Unix-like servers. Prior to 2.652, untrusted users with access to the File Manager or Upload and Download modules can direct Webmin's server-side URL download functionality to non-public network addresses because download destinations are not restricted by resolved IP address. This allows requests to unauthenticated intranet services or cloud-provider instance metadata endpoints that are inaccessible from the user's own system. This issue is fixed in 2.652.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS