EUVD-2026-73712
GHSA-q2h8-g3jm-v966
Severity by source
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
High-privilege authenticated attacker required (PR:H), victim must browse injected content (UI:R), with limited C/I impact consistent with XSS-based spoofing and no availability effect.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
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 Subscription Edition enables an authorized high-privilege attacker to inject malicious script into SharePoint pages, causing spoofing attacks against other users who view the injected content. The CVSS base score of 3.5 reflects the high authentication bar (PR:H) and mandatory victim interaction (UI:R), confining realistic exploitation to insider-threat scenarios or compromised privileged accounts rather than external unauthenticated attackers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a high-privilege SharePoint account on the target server - specifically, a role such as site owner, site collection administrator, or farm administrator that has permissions to author or edit pages and inject content. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is low. … 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 the Microsoft security update bringing SharePoint Server Subscription Edition to build 16.0.20326.20090 or later; the patch is confirmed available per the Microsoft MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69615. … 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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