CVE-2023-40985
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
In Webmin 2.100, a Cross-Site Scripting (XSS) vulnerability was found in the File Manager functionality. An attacker can inject malicious code that executes in the victim's browser during file search or replace operations.
Risk Assessment
The risk includes potential session hijacking, data theft, or unauthorized actions performed in the victim's context. This attack can compromise data confidentiality and integrity within the system.
Recommendation
Immediately upgrade Webmin to a version newer than 2.100 that includes a fix for this vulnerability. Additionally, implement input filtering and output encoding in the File Manager functionality.
Other vulnerabilities in Webmin
See all- CVE-2026-124552Medium
Webmin through 2.670 contains a stored cross-site scripting vulnerability in the Shorewall and Shorewall6 modules' list.cgi, which renders table fields and COMMENT lines unescaped. Authenticated users with table edit permission can store JavaScript via savecmt.cgi or table entries that executes when other users, including root, view the list page.
- CVE-2017-15645High
CSRF exists in Webmin 1.850, allowing an attacker to execute arbitrary commands by sending a GET request to at/create_job.cgi with dir=/&cmd= in the URI.
- 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
An issue was discovered in Webmin <=1.920. The parameter old in password_change.cgi contains a command injection vulnerability.
- CVE-2026-102337Medium
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.
- CVE-2026-42210Medium
Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.640, for Webmin accounts requiring a second authentication factor (typically TOTP), an attacker with knowledge of the username and password can bypass the 2FA requirement by using Basic authentication. As a workaround, apply the patch from commit da18a16c84ae5c0b78cad79609cb0efb174000ec manually.
- 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
The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. An attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.202.
Original NVD description (English source)
An issue was discovered in Webmin 2.100. The File Manager functionality allows an attacker to exploit a Cross-Site Scripting (XSS) vulnerability. By providing a malicious payload, an attacker can inject arbitrary code, which is then executed within the context of the victim's browser when any file is searched/replaced.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS