CVE-2023-4022: Herd Effects < 5.2.3 - 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: 2023-09-11 · updated 2026-06-17

Description

The Herd Effects WordPress plugin before 5.2.3 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

Herd Effects: before 5.2.3 — fixed in 5.2.3

How to fix

Upgrade to a fixed version: Herd Effects 5.2.3. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/c4ac0b19-58b1-4620-b3b7-fbe6dd6c8dd5
https://wpscan.com/vulnerability/c4ac0b19-58b1-4620-b3b7-fbe6dd6c8dd5

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