CVE-2025-53348: 
WordPress vulnerability analysis and mitigation

CVE-2025-53348 is a Missing Authorization (Broken Access Control) vulnerability in the Laborator Kalium WordPress theme. It affects all versions of the Kalium theme up to and including 3.18.3. The vulnerability was published on September 9, 2025, and was assigned by Patchstack. It carries a CVSS v3.1 base score of 5.3 (Medium) (Red Hat CVE, Patchstack).

The root cause is classified as CWE-862 (Missing Authorization), meaning the theme fails to properly verify whether a requesting user has the necessary permissions before performing certain actions. This allows unauthenticated, network-based attackers to exploit incorrectly configured access control security levels with low attack complexity and no user interaction required. The vulnerability is limited in scope — it does not affect confidentiality or availability, but does allow unauthorized modification of data (low integrity impact) (Red Hat CVE, Patchstack).

Successful exploitation allows unauthenticated remote attackers to perform unauthorized actions that should be restricted by access controls within the Kalium WordPress theme. The impact is limited to a low-level integrity compromise — attackers may be able to modify or manipulate certain data or settings without proper authorization. Confidentiality and availability are not impacted, and the vulnerability's scope is unchanged, limiting lateral movement potential (Red Hat CVE).

No public proof-of-concept exploit code or evidence of active in-the-wild exploitation has been reported for CVE-2025-53348. The EPSS score is approximately 0.028% (0.000280), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and no threat actor attribution has been identified (Red Hat CVE, Patchstack).

Users of the Kalium WordPress theme should update to a version beyond 3.18.3 as soon as a patched release is made available by Laborator. In the interim, site administrators should review and restrict access to sensitive theme functionality through WordPress role and capability configurations. Monitoring access logs for unexpected or unauthorized requests to theme-specific endpoints is also advisable (Patchstack).