Security readout for executives and security teams
Plain-English summary
This is a high-severity SharePoint issue that could let a logged-in attacker run code on a vulnerable SharePoint server. Successful compromise could expose or alter sensitive content and disrupt service. The provided sources do not show active exploitation or KEV listing.
Executive priority
Treat as a high-priority patch-management item for SharePoint environments, especially externally reachable or sensitive document repositories. The business risk is high because successful code execution could affect confidentiality, integrity, and availability.
Technical view
CVE-2023-33157 is a Microsoft SharePoint remote code execution vulnerability mapped to CWE-94. CVSS 3.1 is 8.8 with network access, low complexity, low privileges, and no user interaction. The affected products listed are SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition.
Likely exposure
Organizations running the listed on-premises Microsoft SharePoint server versions are the relevant exposure group. The CVSS vector requires low privileges, so compromised or malicious authenticated accounts matter. The bundle does not identify SharePoint Online as affected.
Exploitation context
The source bundle marks CISA KEV status as false and CVSS exploit maturity as unproven. That supports treating exploitation as plausible but not confirmed from the provided evidence. Do not assume active exploitation without additional vendor or threat-intelligence confirmation.
Researcher notes
The evidence is limited to the CVE record, CVE List data, and Microsoft advisory metadata. The CVSS vector indicates authenticated network exploitation without user interaction. No exploit details, proof of concept, or active exploitation evidence is provided in the bundle.
Mitigation direction
- Review the Microsoft MSRC advisory for the official remediation.
- Apply relevant SharePoint security updates according to Microsoft guidance.
- Prioritize internet-facing and business-critical SharePoint farms.
- Review and reduce unnecessary SharePoint privileges.
- Monitor SharePoint servers for suspicious authenticated activity.
Validation and detection
- Inventory SharePoint Enterprise Server 2016, Server 2019, and Subscription Edition instances.
- Confirm installed SharePoint build levels against Microsoft guidance.
- Identify exposed SharePoint endpoints and authentication paths.
- Review logs for unusual authenticated SharePoint activity.
- Document remediation status for each SharePoint farm.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-33157 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft SharePoint Remote Code Execution VulnerabilityCVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.