CVE-2023-49773: 
WordPress vulnerability analysis and mitigation

A Deserialization of Untrusted Data vulnerability (CVE-2023-49773) was discovered in Tim Brattberg BCorp Shortcodes WordPress plugin affecting versions up to 0.23. The vulnerability was reported on December 20, 2023, and was assigned a CVSS v3.1 base score of 9.8 (CRITICAL) by NIST and 10.0 (CRITICAL) by Patchstack (NVD, Patchstack).

The vulnerability is classified as CWE-502 (Deserialization of Untrusted Data) and allows for unauthenticated PHP Object Injection. The CVSS vector string assigned by NIST is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating that the vulnerability can be exploited over the network with no required privileges or user interaction (NVD).

The vulnerability is considered highly dangerous and expected to become mass exploited. If a proper POP chain is present, it could allow malicious actors to execute code injection, SQL injection, path traversal, and denial of service attacks (Patchstack).

No official fix is currently available for this vulnerability. Patchstack has issued a virtual patch to mitigate the issue by blocking potential attacks until an official fix becomes available (Patchstack).