CVE-2023-1554: Quick Paypal Payments < 5.7.26.4 - Admin+ Stored XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-05-02 · updated 2026-06-17
Weakness: CWE-79

Description

The Quick Paypal Payments WordPress plugin before 5.7.26.4 does not sanitise 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)

Affected products

Fullworks Quick Paypal Payments: before 5.7.26.4 — fixed in 5.7.26.4

How to fix

Upgrade to a fixed version: Fullworks Quick Paypal Payments 5.7.26.4. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/0d247a3d-154e-4da7-a147-c1c7e1b5e87e
https://wpscan.com/vulnerability/0d247a3d-154e-4da7-a147-c1c7e1b5e87e

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