CVE-2023-0374: W4 Post List < 2.4.6 - Contributor+ Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-04-17 · updated 2026-06-17
Weakness: CWE-79

Description

The W4 Post List WordPress plugin before 2.4.6 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

Affected products

W4 Post List: before 2.4.6 — fixed in 2.4.6

How to fix

Upgrade to a fixed version: W4 Post List 2.4.6. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/ddb10f2e-73b8-444c-90b2-5c84cdf6de5c
https://wpscan.com/vulnerability/ddb10f2e-73b8-444c-90b2-5c84cdf6de5c

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