# CVE-2026-111303: Microsoft Office SharePoint cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-111303-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-111303 · Severity: high · CVSS 7.3 · Published 2026-11-10

Microsoft Office SharePoint, a collaboration platform used by organizations to manage documents and content, contains a cross-site scripting vulnerability that allows an authenticated attacker to inject malicious scripts into web pages. An attacker could use this to perform spoofing attacks, potentially compromising user trust and enabling credential theft or unauthorized actions within the platform.

Technologies: [Microsoft Office SharePoint](https://junglewise.ai/threats/technologies/office-sharepoint). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-111303 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111303 being exploited in the wild.

**How severe is CVE-2026-111303?** High severity, with a CVSS score of 7.3, published 10 November 2026.

**Which products and versions are affected?** Microsoft Office SharePoint.

**Is there a fix for CVE-2026-111303?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111303 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-111303?** Check whether you run Microsoft Office SharePoint. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in Microsoft Office SharePoint due to improper input sanitization during web page generation. The vulnerability requires authenticated access and user interaction to exploit, allowing an authorized attacker to inject and execute arbitrary JavaScript in the context of other users' browsers to perform spoofing attacks.

## Affected products

- Microsoft Office SharePoint

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-111303](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-111303)

## Related threats

- [Microsoft Office SharePoint privilege escalation via missing authorization](https://junglewise.ai/threats/cve-2026-88176-missing-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint XSS privilege escalation](https://junglewise.ai/threats/cve-2026-80095-improper-neutralization-of-input-during-web-page-generation-cross)
- [Microsoft Office SharePoint server-side request forgery](https://junglewise.ai/threats/cve-2026-124210-server-side-request-forgery-ssrf-in-microsoft-office-sharepoint)
- [Microsoft Office SharePoint privilege escalation via incorrect authorization](https://junglewise.ai/threats/cve-2026-123391-incorrect-authorization-in-microsoft-office-sharepoint-allows-an)
- [Microsoft Office SharePoint deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-123390-deserialization-of-untrusted-data-in-microsoft-office-sharepoint)