CVE-2025-4099

MEDIUM 5.4CVE-2025-4099 · Published 01/05/2025 · updated 17/06/2026

In short

CVE-2025-4099 is a MEDIUM (CVSS 5.4) vulnerability affecting list children (sizeable).
Chance of exploitation in the next 30 days (EPSS): 0.28%, higher than 20.2% of all vulnerabilities.
Fix: update to 2.2.0 or later.

Package	Affected versions	Patched versions
list children sizeable	`< 2.2.0`	`2.2.0`

Description

The List Children plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'list_children' shortcode in all versions up to, and including, 2.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

plugins.trac.wordpress.org/browser/list-children/trunk/list_children.php · Product
plugins.trac.wordpress.org/changeset/3284430 · Patch
wordfence.com/threat-intel/vulnerabilities/id/538b4d4b-f8c6-44db-89d2-d345bfbfecb2 · Third Party Advisory

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