CVE-2024-0561: Ultimate Posts Widget < 2.3.1 - Admin+ 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: 2024-03-11 · updated 2026-06-17
Weakness: CWE-79

Description

The Ultimate Posts Widget WordPress plugin before 2.3.1 does not validate and escape some of its Widget options before outputting them back in attributes, 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

Ultimate Posts Widget: before 2.3.1 — fixed in 2.3.1

How to fix

Upgrade to a fixed version: Ultimate Posts Widget 2.3.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/99b6aa8b-deb9-48f8-8896-f3c8118a4f70/
https://wpscan.com/vulnerability/99b6aa8b-deb9-48f8-8896-f3c8118a4f70/

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