The Icon List Block – Add Icon-Based Lists with Custom Styles plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.2.1 via the fs_api_request function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. Only valid JSON objects are rendered in the response.

The B Carousel Block – Responsive Image and Content Carousel plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 1.1.5. This is due to the plugin not validating user-supplied URLs before passing them to the wp_remote_request() function. This makes it possible for authenticated attackers, with subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

The All In One Image Viewer Block plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.0.2 due to missing authorization and URL validation on the image-proxy REST API endpoint. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

The HTML5 Audio Player – The Ultimate No-Code Podcast, MP3 & Audio Player plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions from 2.4.0 up to, and including, 2.5.1 via the getIcyMetadata() function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

The B Slider- Gutenberg Slider Block for WP plugin for WordPress is vulnerable to Server-Side Request Forgery in version less than, or equal to, 2.0.0 via the fs_api_request function. This makes it possible for authenticated attackers, with subscriber-level access and above to make web requests to arbitrary locations originating from the web application which can be used to query and modify information from internal services.

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.7, the Registry's HTTP-based namespace verification (POST /v0/auth/http, POST /v0.1/auth/http) uses safeDialContext (internal/api/handlers/v0/auth/http.go:67-110) to refuse dialling private/internal addresses when fetching the well-known public-key file from a publisher-supplied domain. The blocklist (isBlockedIP, lines 125-133) relies entirely on Go stdlib's IsLoopback / IsPrivate / IsLinkLocalUnicast / IsMulticast / IsUnspecified plus a manual CGNAT range. None of these cover IPv6 6to4 (2002::/16), NAT64 (64:ff9b::/96 and 64:ff9b:1::/48 per RFC 8215), or deprecated site-local (fec0::/10) — all of which encode arbitrary IPv4 in the address bits and tunnel to RFC1918 / cloud-metadata services on dual-stack / NAT64-enabled hosts. This vulnerability is fixed in 1.7.7.