CVE-2026-46697: Stefanbohacek Fediverse-Embeds-WordPress-Plugin

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Fediverse Embeds embeds fediverse posts on WordPress sites. Prior to version 1.5.8, Fediverse Embeds registered an unauthenticated REST route ftf/media-proxy (includes/Media_Proxy.php) with permission_callback => __return_true that accepted a base64-encoded URL and forwarded it to wp_remote_get($url) without enforcing any allowlist. The plugin's source contained a comment block explicitly acknowledging that the request should be validated against allowed fediverse domains, but in 1.5.7 the validation only set a local $can_download_media flag that was never read. The full response body was echoed back to the caller, so this was a full-read SSRF / open proxy reachable by any anonymous visitor. This issue has been patched in version 1.5.8.

Affected products

• Stefanbohacek Fediverse-Embeds-WordPress-Plugin: before 1.5.8 (fixed in 1.5.8)

Published 2026-06-11. Last modified 2026-06-17.