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Companion Auto Update <= 3.9.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via update_delay_days parameter
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- Companion Auto Update <= 3.9.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via update_delay_days parameter
| CVE | CVE-2025-4369 |
|---|---|
| CVSS | 5.5 (Medium) |
| Publicly Published | Jul 14, 2025 |
| Last Updated | Jul 15, 2025 |
| Researchers | Nabil Irawan |
Description
The Companion Auto Update plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘update_delay_days’ parameter in all versions up to, and including, 3.9.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
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Vulnerability Details
| Software Type | plugin |
| Software Slug | companion-auto-update (view on wordpress.org) |
| Patched | Yes |
| Remediation | Update to version 3.9.3, or a newer patched version |
| Affected Versions |
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| Patched Versions |
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