CVE-2026-6858: Transbank Webpay < 1.14.0 - Unauthenticated Stored XSS

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-22 · updated 2026-07-22
Weakness: CWE-79

Description

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

Affected products

Transbank Webpay: before 1.14.0 — fixed in 1.14.0

How to fix

Upgrade to a fixed version: Transbank Webpay 1.14.0. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/81035d75-81a5-486a-a9fb-b0d1e0befe3c/
https://hackedalert.com/research/transbank-webpay-plugin-xss-to-rce/

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