Auth bypass in Upsellwp

CVE-2026-85350

The UpsellWP WordPress plugin before 2.2.10 does not check that products added to the cart through a Frequently Bought Together campaign belong to that campaign, allowing unauthenticated users to buy arbitrary products at the campaign's discounted price.

Vulnerability class: Broken Authentication

Published · last modified .

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:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% 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-2026-85350: held from 0.003 to 0.003.

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

Affected products

  • Upsellwp

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-85350?
CVE-2026-85350 is a medium-severity vulnerability in Upsellwp, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-09-18.
How severe is CVE-2026-85350?
Medium severity. CVSS v3 base score is 5.3 out of 10.