Security readout for executives and security teams
Plain-English summary
CVE-2020-1450 is a Microsoft SharePoint cross-site scripting flaw. An attacker with low privileges could send a crafted request and rely on user interaction to run script in a SharePoint user’s browser context. Business impact is mainly confidentiality and integrity risk, not service outage.
Executive priority
Schedule remediation through the standard vulnerability program, with faster handling for exposed or high-use SharePoint sites. This is not supported as actively exploited here, but SharePoint commonly hosts sensitive internal data and collaboration workflows.
Technical view
The vulnerability is CWE-79 XSS caused by improper sanitization of specially crafted web requests to affected SharePoint servers. CVSS 3.1 is 5.4: network exploitable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to environments running affected Microsoft SharePoint Enterprise Server 2016 or 2013 SP1, or Microsoft SharePoint Server 2019 or 2010 SP2. Risk is higher for broadly accessible SharePoint sites with many authenticated users.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates exploitation requires low privileges and user interaction. Treat it as a credible web application risk, but not as a confirmed actively exploited emergency based on this bundle.
Researcher notes
Keep validation non-destructive. The sources identify XSS behavior and affected SharePoint products but do not provide detailed vulnerable endpoints, indicators, or exploit telemetry. Distinguish this CVE from CVE-2020-1451 and CVE-2020-1456 as the record states they are unique.
Mitigation direction
- Identify SharePoint versions matching the affected product list.
- Review the MSRC advisory for Microsoft’s applicable update or mitigation guidance.
- Apply vendor-directed remediation through normal SharePoint change control.
- Prioritize internet-facing or widely used authenticated SharePoint deployments.
- Track remediation evidence in vulnerability management records.
Validation and detection
- Inventory SharePoint 2010 SP2, 2013 SP1, 2016 Enterprise, and 2019 deployments.
- Compare installed builds against the MSRC advisory guidance.
- Confirm whether affected sites are internet-accessible or restricted internally.
- Verify remediation status through patch records or configuration evidence.
- Record that KEV evidence is absent in the provided source bundle.
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-2020-1450 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-2020-1450CVE 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.