CVE-2025-27287: 
WordPress vulnerability analysis and mitigation

The SS Quiz WordPress plugin contains a PHP Object Injection vulnerability (CVE-2025-27287) discovered in versions up to and including 2.0.5. The vulnerability was identified on February 21, 2025, by security researcher João Pedro Soares de Alcântara. This security flaw stems from the deserialization of untrusted data, allowing unauthenticated attackers to perform object injection attacks (WPScan, Patchstack).

The vulnerability is classified as a PHP Object Injection (CWE-502) resulting from improper handling of deserialization of untrusted data. It has received a Critical CVSS score of 9.8, indicating its severe nature. While no known POP (Property-Oriented Programming) chain is present in the vulnerable software itself, the presence of additional plugins or themes could provide the necessary chain for exploitation (WPScan).

If successfully exploited, particularly in the presence of a POP chain through additional plugins or themes, attackers could potentially delete arbitrary files, retrieve sensitive data, or execute malicious code on the affected system. The vulnerability is considered highly dangerous and is expected to become mass exploited (Patchstack).

Currently, there is no official fix 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 these mitigations immediately (Patchstack).