CVE-2026-12517 Fediverse Embeds < 1.5.8 - Unauthenticated SSRF via Site Info Endpoint
Unauthenticated attackers can exploit an SSRF vulnerability in the Fediverse Embeds WordPress plugin to access internal network resources and read metadata.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12517?
CVE-2026-12517 is a medium-severity server-side request forgery vulnerability in Unknown Fediverse Embeds, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Fediverse Embeds WordPress plugin before 1.5.8 does not validate the destination of the server-side request performed by an unauthenticated site-info endpoint before fetching it, allowing anonymous users (the gating nonce is exposed on public pages carrying an embed) to make the site request internal and private-network URLs and read back the parsed page metadata. This is a Server-Side Request Forgery.
Which versions are affected by CVE-2026-12517?
How do I fix CVE-2026-12517?
No fix has been published for CVE-2026-12517 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-12517 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12517 exists.
Sources
Also known as GHSA-9x4j-8g3j-786h.