CVE-2024-12562
Published: 15 February 2025
Summary
CVE-2024-12562 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability in S2Member S2Member. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 23.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2024-12562 is a PHP Object Injection vulnerability (CWE-502) in the s2Member Pro plugin for WordPress, affecting all versions up to and including 241216. The issue stems from deserialization of untrusted input passed through the 's2member_pro_remote_op' parameter, allowing attackers to inject arbitrary PHP objects.
Unauthenticated attackers can exploit this vulnerability remotely with low complexity and no user interaction required, as reflected in its CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Although no known Proof-of-POP (Property-Oriented Programming) chain exists within the vulnerable s2Member Pro software itself, the injection could be leveraged for severe impacts if a POP chain is available via other installed plugins or themes, potentially enabling arbitrary file deletion, sensitive data retrieval, or remote code execution.
Advisories and patch information are detailed in the s2Member changelog at https://s2member.com/changelog/ and Wordfence threat intelligence at https://www.wordfence.com/threat-intel/vulnerabilities/id/65192fdb-86db-475a-8c61-4db922920cfe?source=cve.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-50960
Vulnerability details
The s2Member Pro plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 241216 via deserialization of untrusted input from the 's2member_pro_remote_op' vulnerable parameter. This makes it possible for unauthenticated attackers to inject a…
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PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct unauthenticated remote exploitation of a public-facing WordPress plugin via deserialization of untrusted input, matching T1190 as the primary initial access vector; potential RCE impact is secondary and depends on external POP chains.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Timely flaw remediation directly patches the PHP Object Injection vulnerability in the s2Member Pro plugin via deserialization of the 's2member_pro_remote_op' parameter.
Information input validation prevents deserialization attacks by checking the validity of untrusted data in the 's2member_pro_remote_op' parameter before processing.
Vulnerability scanning identifies the presence of the vulnerable s2Member Pro plugin version, enabling proactive remediation.