Vulnerability in Link Factory

CVE-2026-15413

The Link Factory WordPress plugin is a backdoor. Distributed as a "homepage sentence publisher", it exposes an operator-controlled REST API under /wp-json/link-factory/v1/ - authenticated by a detached Ed25519 signature verified against a hardcoded operator public key (except for the health check).

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-15413: held from 0.003 to 0.005.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

  • Link Factory — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-15413?
CVE-2026-15413 is a critical-severity vulnerability in Link Factory, classified under Hidden Functionality. CVSS score: 10.0/10. Published 2026-08-13.
How severe is CVE-2026-15413?
Critical severity. CVSS v3 base score is 10.0 out of 10.