WordPress · Wordpress Importer · CVE-2024-13889
**Name of the Vulnerable Software and Affected Versions**
WordPress Importer plugin versions up to, and including, 0.8.3
**Description**
The issue is related to PHP Object Injection via deserialization of untrusted input in the `maybe unserialize` function. This allows authenticated attackers with Administrator-level access and above to inject a PHP Object. However, the vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code, depending on the POP chain present.
**Recommendations**
For WordPress Importer plugin versions up to, and including, 0.8.3, update to a version above 0.8.3 to resolve the issue. As a temporary workaround, consider disabling the `maybe unserialize` function until a patch is available. Restrict access to the plugin to minimize the risk of exploitation. Avoid using untrusted input in the deserialization process until the issue is resolved.