CVE-2025-39500: 
WordPress vulnerability analysis and mitigation

A critical Deserialization of Untrusted Data vulnerability (CVE-2025-39500) was discovered in GoodLayers Hostel WordPress plugin affecting versions through 3.1.2. The vulnerability was reported by security researcher Bonds on January 29, 2025, and was publicly disclosed on May 20, 2025. This unauthenticated PHP Object Injection vulnerability received a Critical CVSS v3.1 score of 9.8 (Patchstack, NVD).

The vulnerability is classified as CWE-502 (Deserialization of Untrusted Data) and allows for PHP Object Injection through unauthenticated access. The severity is rated as Critical with a CVSS v3.1 Base Score of 9.8 (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating network accessibility, low attack complexity, and no required privileges or user interaction (NVD, Patchstack).

The vulnerability could potentially allow malicious actors to execute code injection, SQL injection, path traversal, and denial of service attacks if a proper POP chain is present. The high CVSS score of 9.8 indicates that this vulnerability is highly dangerous and is expected to become mass exploited (Patchstack).

As of May 2025, no official fix is available for this vulnerability. Patchstack has issued a virtual patch to mitigate the issue by blocking potential attacks until an official fix becomes available. Website owners are advised to implement mitigation measures immediately (Patchstack).