CVE-2025-62210 Overview
CVE-2025-62210 is a stored cross-site scripting (XSS) vulnerability in Microsoft Dynamics 365 Field Service (online). The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. An authorized attacker can inject malicious script content that executes in the browser context of other users, enabling spoofing attacks across a network. The vulnerability requires low privileges and user interaction, but successful exploitation results in a scope change that impacts components beyond the vulnerable application. Microsoft has issued a security advisory addressing this issue.
Critical Impact
An authenticated attacker can perform network-based spoofing attacks against Dynamics 365 Field Service users, compromising confidentiality and integrity of cross-tenant resources.
Affected Products
- Microsoft Dynamics 365 Field Service (online)
- Microsoft Dynamics 365 (cloud-hosted service)
- Tenants with Field Service module enabled
Discovery Timeline
- 2025-11-11 - CVE-2025-62210 published to NVD
- 2025-11-17 - Last updated in NVD database
Technical Details for CVE-2025-62210
Vulnerability Analysis
The vulnerability resides in the web page generation logic of Dynamics 365 Field Service. Input supplied by an authenticated user is rendered into HTML responses without sufficient encoding or sanitization. When a victim user loads the affected page, attacker-controlled script executes within the victim's browser session under the Dynamics 365 origin. Because the scope is changed during exploitation, the injected payload can reach resources beyond the initially vulnerable component, including other tenant data or linked services the victim can access. The EPSS data indicates a low current probability of opportunistic exploitation, but the impact remains significant given Dynamics 365's role in field operations and customer engagement.
Root Cause
The root cause is improper neutralization of input during web page generation [CWE-79]. Field Service accepts input through forms, work orders, notes, or related entity fields and reflects that input into rendered pages without adequate output encoding. Any user with permission to write to those fields can store a malicious payload that triggers when other users view the affected record.
Attack Vector
The attack vector is network-based and requires the attacker to hold an authenticated, low-privilege account in the target Dynamics 365 tenant. The attacker submits crafted input containing JavaScript through a Field Service entity field or form. A victim with appropriate access then opens the record, and the browser executes the payload. The script can issue authenticated requests, capture session tokens, manipulate displayed data, or impersonate the victim to perform spoofing actions across linked services. No verified public proof-of-concept is available at this time.
Detection Methods for CVE-2025-62210
Indicators of Compromise
- Unexpected <script> tags, event handlers (e.g., onerror, onload), or javascript: URIs stored in Dynamics 365 Field Service entity fields such as work order descriptions, notes, or custom fields.
- Outbound HTTP requests from user browser sessions to attacker-controlled domains originating from the Dynamics 365 application origin.
- Anomalous record modifications or API calls executed under the identity of users who only viewed records but did not author changes.
Detection Strategies
- Audit Dynamics 365 entity field content for HTML or JavaScript patterns using Microsoft Purview or the Dataverse audit log.
- Enable and review Microsoft 365 Defender browser session telemetry for script execution anomalies tied to the Dynamics 365 domain.
- Correlate Dynamics 365 user activity logs against expected workflow patterns to identify actions performed without explicit user intent.
Monitoring Recommendations
- Forward Dynamics 365 and Microsoft Entra ID sign-in and audit logs to a centralized SIEM for retention and correlation.
- Alert on bulk record reads or modifications executed shortly after a record view event, which can indicate XSS-driven automation.
- Monitor for new or modified records containing encoded payloads such as <script> or %3Cscript%3E.
How to Mitigate CVE-2025-62210
Immediate Actions Required
- Apply the Microsoft service update for Dynamics 365 Field Service as referenced in the Microsoft CVE-2025-62210 Advisory.
- Review existing Field Service records for stored payloads and remove any HTML or script content from text fields.
- Restrict write permissions on Field Service entities to the minimum set of users required for business operations.
Patch Information
Microsoft Dynamics 365 Field Service is a cloud-hosted service, and Microsoft applies fixes server-side. Customers should confirm their tenant is running the patched service version per the Microsoft CVE-2025-62210 Advisory and verify no additional configuration steps are required for their environment.
Workarounds
- Enforce least-privilege role assignments in Dynamics 365 to limit which accounts can write to shared Field Service records.
- Require multi-factor authentication on all Dynamics 365 accounts to reduce the risk of attacker account compromise.
- Configure Content Security Policy headers and browser isolation for users who access Dynamics 365 from high-risk endpoints.
# Example: Verify Dynamics 365 tenant version via PowerShell
Get-CrmOrganization -ConnectionString "AuthType=OAuth;Url=https://<org>.crm.dynamics.com" | Select-Object FriendlyName, Version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
