Security readout for executives and security teams
Plain-English summary
This is a SharePoint cross-site scripting issue. An attacker with low privileges could send a crafted request that causes script to run in another user’s browser. The likely impact is trusted-site phishing, session misuse, or content manipulation, not direct server takeover.
Executive priority
Handle this as a normal-priority SharePoint security update unless the affected portal is externally reachable or highly trusted internally. The risk is browser-side compromise through SharePoint trust, not infrastructure destruction.
Technical view
CVE-2020-0924 is a CWE-79 XSS flaw in Microsoft SharePoint sanitization of 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, no availability impact.
Likely exposure
Exposure is limited to affected SharePoint deployments: SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Foundation 2013 SP1. Risk is higher where portals are broadly reachable and low-privilege accounts are common.
Exploitation context
The supplied sources do not report active exploitation, and this CVE is not marked KEV. The CVSS vector indicates exploitation requires low privileges and user interaction. No public exploit status is established in the provided evidence.
Researcher notes
This CVE is distinct from several related 2020 SharePoint XSS CVEs. Evidence supports XSS only; do not infer remote code execution. Patch details and exact vulnerable build ranges are not included in the supplied bundle beyond Microsoft’s advisory link.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2020-0924 and apply applicable SharePoint updates.
- Prioritize internet-facing or partner-facing SharePoint farms first.
- Limit low-privilege account creation and access where business permits.
- Monitor Microsoft guidance for any revised remediation or detection advice.
Validation and detection
- Inventory SharePoint versions and confirm whether affected editions are present.
- Check patch records against Microsoft’s CVE-2020-0924 advisory.
- Review SharePoint access logs for unusual crafted requests or suspicious user-driven activity.
- Confirm vulnerability scanner findings map specifically to CVE-2020-0924.
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-2020-0924 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-2020-0924CVE 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.