CVE-2026-12516 Fediverse Embeds < 1.5.8 - Unauthenticated SSRF via Media Proxy
Unauthenticated attackers can exploit an SSRF vulnerability in the Fediverse Embeds plugin to fetch arbitrary internal URLs and read response data.
- 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-2026-12516?
CVE-2026-12516 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 media-proxying endpoint, allowing anonymous users to make the site fetch arbitrary URLs, including internal and private-network addresses, and read back the response body. This results in a full-read Server-Side Request Forgery and open proxy.
Which versions are affected by CVE-2026-12516?
How do I fix CVE-2026-12516?
No fix has been published for CVE-2026-12516 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-2026-12516 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12516 exists.
Sources
Also known as GHSA-9jc6-q7qm-59qj.