{"id":23477,"date":"2026-09-16T04:31:37","date_gmt":"2026-09-15T20:31:37","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18424"},"modified":"2026-09-16T04:31:37","modified_gmt":"2026-09-15T20:31:37","slug":"cve-2026-18424","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18424","title":{"rendered":"CVE-2026-18424 &#8211; Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Server-Side Request Forgery iremote file impo"},"content":{"rendered":"<p>Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Server-Side Request Forgery iremote file import via cross-port reuse of a host&#8217;s validated DNS pin. When multiple remote URLs share the same host, only the first `ValidatedRemoteUrl` is retained and reused for every later URL with that host. A low-privileged authenticated user permitted to import files could therefore supply a DNS-rebinding host that resolved to a public address during validation and to a private or loopback address during the unpinned download, causing the server to fetch internal-only resources such as loopback services, internal admin panels, or cloud metadata endpoints and to save the responses into the file manager.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.1 with vector CVSS:4.0\/AV:N\/AC:H\/AT:P\/PR:H\/UI:N\/VC:L\/VI:N\/VA:N\/SC:L\/SI:N\/SA:N. Thanks Ahmad Wicaksono (sonix03) for reporting.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Server-Side Request Forgery iremote file import via cross-port reuse of a host&#8217;s validated DNS pin. When multiple remote URLs share the same host, only the<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-23477","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/23477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}