Klaviyo <= 3.0.10 - Admin+ Stored XSS

2023-03-2000:00:00

Rafshanzani Suhada

129

klaviyo

settings

public api key

stored xss

exploit

0.001 Low

EPSS

Percentile

23.6%

JSON

The plugin does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

1. Go to Klaviyo Settings, and at Klaviyo Settings in thePublic API Key field, put: "autofocus onfocus=alert(1)//
2. Submit and the alert will trigger.

0.001 Low

EPSS

Percentile

23.6%

JSON

Related for WPEX-ID:495E39DB-793D-454B-9EF1-DD91CAE2C49B