CVE-2025-30384
Published: 13 May 2025
Summary
CVE-2025-30384 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Microsoft Sharepoint Server. Its CVSS base score is 7.4 (High).
Operationally, ranked in the top 17.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-30384 is a deserialization of untrusted data vulnerability, tracked under CWE-502, that affects Microsoft Office SharePoint. The flaw carries a CVSS 3.1 base score of 7.4 with an attack vector that is local, high complexity, requires no privileges or user interaction, and yields high impact to confidentiality, integrity, and availability.
An unauthorized attacker who can supply a crafted serialized object to the affected SharePoint component can trigger local code execution on the target system. The local attack vector and high complexity requirements limit the ease of exploitation but still allow an attacker with access to the host or a suitable entry point to achieve arbitrary code execution without authentication.
Microsoft has published an advisory for CVE-2025-30384 at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30384 that addresses patches and mitigation steps. The associated EPSS score remains low, moving only from 0.0167 currently to a peak of 0.0176.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-14451
Vulnerability details
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.