EUVD-2026-79503

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'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...

CVE-2026-18424 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to SSRF protection bypass in remote file import when multiple URLs share a host but use different ports

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'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...

CVE-2026-18424 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to SSRF protection bypass in remote file import when multiple URLs share a host but use different ports

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'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...

CVE-2026-18424 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to SSRF protection bypass in remote file import when multiple URLs share a host but use different ports

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'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...

CVE-2026-18424

Concrete CMS versions 9.0.0 through 9.5.2 are vulnerable to a Server-Side Request Forgery (SSRF) in the remote file import feature. The root cause is a cross-port reuse of a validated DNS pin : when multiple remote URLs share the same host, only the first ValidatedRemoteUrl is retained and reused...

CVE-2023-48306 Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0...

CVE-2023-48306: Server-Side Request Forgery (SSRF)

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0...

Nextcloud: DNS pin middleware can be tricked into DNS rebinding allowing SSRF

A vulnerability was disclosed where the DNS pin middleware could be tricked into DNS rebinding, allowing SSRF...

Design/Logic Flaw

Microsoft Internet Explorer 6 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80, a differen...