Security readout for executives and security teams
Plain-English summary
This is a Microsoft SharePoint Server remote code execution vulnerability. An attacker who already has high privileges could run code on an affected SharePoint server. Because CISA lists it in KEV, treat it as exploited in the wild and prioritize remediation for exposed or business-critical SharePoint environments.
Executive priority
Treat this as urgent for any on-premises SharePoint environment because CISA confirms known exploitation. The privilege requirement lowers broad opportunistic risk, but successful compromise could affect sensitive documents, workflows, and server availability.
Technical view
CVE-2023-24955 is a CWE-94 code injection issue affecting SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition. CVSS 3.1 is 7.2: network reachable, low complexity, no user interaction, high privileges required, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in organizations running on-premises Microsoft SharePoint Server 2016, 2019, or Subscription Edition. The source bundle does not identify SharePoint Online or other Microsoft products as affected.
Exploitation context
CISA KEV status supports known exploitation. The provided sources do not include exploit volume, actor attribution, public exploit details, or weaponization specifics. The CVSS vector indicates exploitation requires high privileges but no user interaction.
Researcher notes
The bundle supports affected product families, CVSS vector, CWE-94 classification, official Microsoft advisory presence, and CISA KEV status. It does not provide root cause details, exploit mechanics, indicators of compromise, or a named mitigation beyond Microsoft updates and guidance.
Mitigation direction
- Apply Microsoft security updates listed in the MSRC advisory.
- Prioritize internet-facing and high-value SharePoint servers first.
- Confirm all affected SharePoint farms are on supported, patched builds.
- Check Microsoft guidance for any product-specific prerequisites or follow-up actions.
Validation and detection
- Inventory SharePoint Server 2016, 2019, and Subscription Edition deployments.
- Compare installed builds against Microsoft’s CVE-2023-24955 advisory.
- Confirm vulnerability scanner results clear after patching.
- Review privileged SharePoint activity for suspicious behavior.
Public sources used
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-2023-24955 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
- 7.2 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.
CISA KEV status
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:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/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 Server Remote Code Execution VulnerabilityCVE reference · vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24955CVE reference · government-resource
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.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.