CVE-2023-33130
Published: 14 June 2023
Summary
CVE-2023-33130 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Microsoft Sharepoint Server. Its CVSS base score is 7.3 (High).
Operationally, ranked in the top 36.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft SharePoint Server contains a spoofing vulnerability tracked as CVE-2023-33130. The flaw is associated with CWE-79 and carries a CVSS 3.1 score of 7.3 reflecting network attack vector, low attack complexity, low privileges required, and required user interaction. It affects on-premises SharePoint Server deployments.
An authenticated attacker can exploit the issue to present spoofed content that leads to high-impact compromise of confidentiality and integrity on the target system. The attack requires the victim to interact with the malicious content but does not need elevated privileges beyond a standard SharePoint user account.
Microsoft security advisories hosted at the MSRC update guide for CVE-2023-33130 describe available patches and mitigation guidance for supported SharePoint Server versions.
EPSS for the CVE rose from a low baseline to a peak of 0.0762 on 2025-01-22 before receding to the current value of 0.0043, indicating a period of increased exploitation interest after public disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-37316
Vulnerability details
Microsoft SharePoint Server Spoofing Vulnerability
- 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 submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.