EUVD-2026-56700
GHSA-7mj3-pc67-p4w8
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Low-privilege authentication required to inject content; victim interaction mandatory; scope change reflects script execution in victim browser; no availability impact on SharePoint server.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
AnalysisAI
Cross-site scripting in Microsoft SharePoint Server enables an authenticated attacker with low privileges to inject malicious scripts into web-rendered content, executing arbitrary JavaScript in victims' browsers and enabling spoofing attacks over the network. All three actively-supported SharePoint Server product lines are affected: Enterprise 2016, 2019, and Subscription Edition - making this a broad enterprise exposure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold at least a low-privilege authenticated account in the target SharePoint environment (PR:L per CVSS vector) with sufficient permissions to create or edit content that gets rendered in another user's browser. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.4 Medium score reflects a real-world risk profile that is meaningful but not critical. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply vendor-released patches for the respective product line: SharePoint Enterprise Server 2016 should be updated to 16.0.5565.1001 or later; SharePoint Server 2019 should be updated to 16.0.10417.20198 or later; SharePoint Server Subscription Edition should be updated to 16.0.19725.20522 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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