Auth bypass in Unbounce Landing Pages

CVE-2026-85574

The Unbounce Landing Pages WordPress plugin before 1.1.5 does not perform any authorisation check when updating the configuration its front-end proxy relies on, allowing any authenticated user, such as a subscriber, to point that proxy at a host they control and have arbitrary content served from the site's own origin.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (27.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.7% 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-2026-85574: held from 0.003 to 0.003.

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

Affected products

  • Unbounce Landing Pages

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-85574?
CVE-2026-85574 is a high-severity vulnerability in Unbounce Landing Pages, classified under Missing Authorization. CVSS score: 8.0/10. Published 2026-09-19.
How severe is CVE-2026-85574?
High severity. CVSS v3 base score is 8.0 out of 10.