What is CVE-2026-12516?

CVE-2026-12516 is a medium-severity vulnerability in Fediverse Embeds, classified under CWE-918 SERVER-SIDE REQUEST FORGERY (SSRF). CVSS score: 5.3/10. Published 2026-07-09.

How severe is CVE-2026-12516?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Fediverse Embeds

CVE-2026-12516

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.

Published 2026-07-09 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.2th percentile), scored 2026-10-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Fediverse Embeds — versions 0

References

wpscan.com/vulnerability/2ac80164-03b7-4966-b022-833b4194de80/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-12516?: CVE-2026-12516 is a medium-severity vulnerability in Fediverse Embeds, classified under CWE-918 SERVER-SIDE REQUEST FORGERY (SSRF). CVSS score: 5.3/10. Published 2026-07-09.
How severe is CVE-2026-12516?: Medium severity. CVSS v3 base score is 5.3 out of 10.