Auth bypass in Private Feed Key

CVE-2026-86707

The Private Feed Key WordPress plugin through 0.1 does not verify that the key used to authenticate a feed request is one it issued, matching any stored user metadata value instead, which allows unauthenticated attackers to log in as any user, including administrators.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% 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-2026-86707: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Private Feed Key

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-86707?
CVE-2026-86707 is a critical-severity vulnerability in Private Feed Key, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-09-17.
How severe is CVE-2026-86707?
Critical severity. CVSS v3 base score is 9.8 out of 10.