What is CVE-2026-6858?

CVE-2026-6858 is a high-severity vulnerability in Transbank Webpay, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-06-22.

How severe is CVE-2026-6858?

High severity. CVSS v3 base score is 7.1 out of 10.

XSS in Transbank Webpay

CVE-2026-6858

The Transbank Webpay WordPress plugin before 1.14.0 does not sanitize and escape logs to be displayed, allowing unauthenticated users to perform Stored XSS attacks against logged in administrator

Vulnerability class: XSS (Cross-Site Scripting)

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.

Affected products

Unknown Transbank Webpay — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-6858?: CVE-2026-6858 is a high-severity vulnerability in Transbank Webpay, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-06-22.
How severe is CVE-2026-6858?: High severity. CVSS v3 base score is 7.1 out of 10.