CVE-2024-56291: 
WordPress vulnerability analysis and mitigation

The PlainInventory WordPress plugin contains a Deserialization of Untrusted Data vulnerability (CVE-2024-56291) that allows for PHP Object Injection. This vulnerability affects PlainInventory versions up to and including 3.1.6, and was discovered by LVT-tholv2k. The issue was publicly disclosed on January 3, 2025 (WPScan, Patchstack).

The vulnerability is classified as CWE-502 (Deserialization of Untrusted Data) and allows unauthenticated attackers to perform PHP Object Injection. The CVSS v3.1 base score is 8.1 (High) with the vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. While no known POP (Property-Oriented Programming) chain is present in the vulnerable software itself, if a POP chain exists via additional plugins or themes on the target system, it could enable more severe exploitation (WPScan).

The vulnerability could potentially allow attackers to delete arbitrary files, retrieve sensitive data, or execute code if a suitable POP chain is present in the target system. The high CVSS score indicates significant potential impact on the confidentiality, integrity, and availability of the affected system (WPScan).

The vulnerability has been fixed in version 3.1.7 of the PlainInventory plugin. Users are strongly advised to update to this version or later to resolve the security issue. Patchstack has also issued a virtual patch to mitigate this vulnerability by blocking potential attacks until users can update to the fixed version (Patchstack).