XSS in Yaypricing

CVE-2026-87888

The YayPricing WordPress plugin before 3.5.7 does not perform an authorization check on a REST route that saves its pricing rules, allowing users with the subscriber role and above to store JavaScript that executes in the browser of an administrator who opens the YayPricing WordPress plugin before 3.5.7's settings page.

Vulnerability class: XSS (Cross-Site Scripting)

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: 0.004 (35.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% 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-2026-87888: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Yaypricing

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-87888?
CVE-2026-87888 is a high-severity vulnerability in Yaypricing, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2026-09-12.
How severe is CVE-2026-87888?
High severity. CVSS v3 base score is 8.0 out of 10.