CVE-2022-4508: ConvertKit < 2.0.5 - Contributor+ Stored XSS

Severity: medium (CVSS 5.4 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: 2023-01-16 · updated 2026-06-17

Description

The ConvertKit WordPress plugin before 2.0.5 does not validate and escapes some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as a contributor to perform Stored Cross-Site Scripting attacks, which could be used against high-privilege users such as admins.

Affected products

ConvertKit: before 2.0.5 — fixed in 2.0.5

How to fix

Upgrade to a fixed version: ConvertKit 2.0.5. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/5101a979-7a53-40bf-8988-6347ef851eab
https://wpscan.com/vulnerability/5101a979-7a53-40bf-8988-6347ef851eab

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