Security readout for executives and security teams
Plain-English summary
CVE-2020-0930 is a Microsoft SharePoint cross-site scripting issue. An attacker with low privileges could send a crafted request that causes script execution in a user’s browser if that user interacts with it. Business impact is mainly account misuse, data exposure, and trust damage inside SharePoint workflows.
Executive priority
Treat as a planned but timely remediation item. It is not flagged as actively exploited in the provided sources, but SharePoint often contains sensitive business data and trusted workflows, so unpatched exposed systems should not linger.
Technical view
The issue is CWE-79 in Microsoft SharePoint Server sanitization of specially crafted web requests. CVSS 3.1 is 5.4: network reachable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is limited to Microsoft SharePoint Server 2019 and Microsoft SharePoint Enterprise Server 2016 or 2013 Service Pack 1, based on the bundle. Internet-facing SharePoint and sites with many authenticated users carry higher practical risk.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. The CVSS vector indicates exploitation requires an authenticated or low-privileged position and user interaction, which reduces urgency compared with unauthenticated remote code execution.
Researcher notes
Evidence is sufficient for affected products, weakness class, and CVSS characteristics. The bundle does not provide exploit details, proof-of-concept status, or explicit patch package information beyond the Microsoft advisory reference.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2020-0930 and apply applicable security updates.
- Inventory SharePoint Server 2019, 2016, and 2013 SP1 deployments.
- Prioritize externally reachable SharePoint instances and high-value collaboration sites.
- Restrict SharePoint access to trusted networks where business requirements allow.
- Monitor Microsoft guidance for superseding updates or additional mitigation notes.
Validation and detection
- Confirm SharePoint product and version against the affected list.
- Check patch compliance against Microsoft’s CVE-2020-0930 advisory.
- Verify whether affected SharePoint sites are internet-facing or broadly accessible.
- Review vulnerability scanner findings mapped specifically to CVE-2020-0930.
- Check security logs for suspicious SharePoint requests or unusual user-session activity.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2020-0930 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
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0930CVE reference · x_refsource_MISC
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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.