CVE-2025-4369

MEDIUM EPSS 15.1%
Published Jul 15, 202511mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
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Published Jul 15, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
15.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 4

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/companion-auto-update/tags/3.9.2/admin/dashboard.php#L71
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3325878/
  • wordpress.org https://wordpress.org/plugins/companion-auto-update/#developers
  • wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b4c61072-5480-43f3-ad9f-ed3f0d577ebc?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.