What is GHSA-9x4j-8g3j-786h?

GHSA-9x4j-8g3j-786h is a security advisory published by GitHub Security Advisories with Medium severity. The Fediverse Embeds WordPress plugin before 1.5.8 does not validate the destination of the...

Which CVE IDs does GHSA-9x4j-8g3j-786h cover?

GHSA-9x4j-8g3j-786h covers the following CVE IDs: CVE-2026-12517. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-9x4j-8g3j-786h?

GHSA-9x4j-8g3j-786h has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

GHSA-9x4j-8g3j-786hMediumCVSS 5.3

The Fediverse Embeds WordPress plugin before 1.5.8 does not validate the destination of the...

Vendor

GitHub Security Advisories

Published

July 9, 2026

Last Modified

July 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-12517 →

📋 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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-12517
https://wpscan.com/vulnerability/460a996f-e27d-47e8-9d68-9e6be93100c0
https://github.com/advisories/GHSA-9x4j-8g3j-786h