EUVD-2026-56292
GHSA-g98p-8265-rp44
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Authenticated low-privilege attacker (PR:L) injects script; victim interaction required (UI:R); scope changes to victim browser (S:C); no availability impact for XSS spoofing.
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 allows an authenticated network attacker to perform spoofing attacks against users by injecting malicious script content into web pages served by the platform. Affected deployments include SharePoint Server Subscription Edition prior to build 16.0.19725.20522 and SharePoint Server 2019 prior to build 16.0.10417.20198. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold at least a low-privileged authenticated account on the target SharePoint deployment (PR:L), meaning anonymous or external unauthenticated access is insufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.4 (Medium) reflects a constrained attack profile: the attacker must be authenticated (PR:L) and must induce a victim to interact with the malicious content (UI:R), preventing opportunistic mass exploitation. … 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 | Patch available per vendor advisory: upgrade SharePoint Server Subscription Edition to build 16.0.19725.20522 or later, and SharePoint Server 2019 to build 16.0.10417.20198 or later, as confirmed by EUVD-2026-56292. … 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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