XSS in Ultimate-Woocommerce-Auction-Pro

CVE-2026-4259

The ultimate-woocommerce-auction-pro WordPress plugin through 2.4.5 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (15.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.2% 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-2026-4259: held from 0.003 to 0.003.

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

Affected products

  • Ultimate-Woocommerce-Auction-Pro — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4259?
CVE-2026-4259 is a high-severity vulnerability in Ultimate-Woocommerce-Auction-Pro, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-06-22.
How severe is CVE-2026-4259?
High severity. CVSS v3 base score is 7.1 out of 10.