These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.
CVE-2026-56022 is a medium-severity vulnerability in Webmin that allows authentication bypass when a specific 'User-Agent' header is provided. An attacker can bypass additional MFA requirements by providing the 'User-Agent: webmin' header. The vulnerability was fixed in Webmin version 2.641. Users of affected Webmin versions should update to 2.641 or later to mitigate this vulnerability. This vulnerabilit [truncated]
CVE-2026-56021 is a medium-severity vulnerability in Webmin that allows unauthenticated attackers to read .conf files within module directories. This issue arises from a bypassable regex pattern. The vulnerability has a CVSS score of 6.9 and is considered medium severity. Webmin users should be aware of this issue and take necessary actions to mitigate it. The CVE was published on June 18, 2026, and no mo [truncated]
CVE-2026-56020 is a critical vulnerability in the Webmin HTTP server (miniserv.pl) that allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. This vulnerability enables remote attackers to spoof certificate DNs and authenticate as any user. The issue was fixed in version 2.641 of Webmin. Organizations using Webmin should prioriti [truncated]
A critical path traversal vulnerability exists in Webmin versions prior to 2.640, specifically within the mailboxes component's attachment handling functionality. The flaw resides in `mailboxes/detachall.cgi`, where unsafe filename construction during attachment saving operations allows attackers to manipulate file paths. This vulnerability carries a CVSS 4.0 score of 9.4 (Critical), indicating severe imp [truncated]
A cross-site scripting (XSS) vulnerability exists in Webmin versions prior to 2.640. The flaw resides in the mailboxes/detach.cgi component, which handles email attachments. When an SVG document is attached to an email and subsequently viewed within the Webmin mailboxes interface, the application serves the file with a content type of image/svg+xml rather than a safe alternative such as text/plain. This a [truncated]
CVE-2026-22678 affects Webmin before 2.641 and is described as a stored cross-site scripting vulnerability in the System and Server Status module. The issue is tied to the email template description field, where unsanitized input is stored by save_tmpl.cgi and later rendered unescaped in list_tmpls.cgi. The supplied CVE description says low-privileged authenticated attackers could use this to execute arbi [truncated]
CVE-2019-15107 is a Webmin command injection vulnerability that CISA has added to its Known Exploited Vulnerabilities catalog. Because it is known to be exploited, defenders should treat patching and exposure review as urgent, especially for any Webmin deployment used for administrative access.