Quick answers
- Is CVE-2026-111300 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111300 being exploited in the wild.
- How severe is CVE-2026-111300?
- 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-2026-111300?
- 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-2026-111300 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-111300?
- 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
Improper input neutralization during web page generation in SharePoint enables stored cross-site scripting (XSS), allowing an authenticated attacker to inject malicious JavaScript that executes in the browsers of other users. The vulnerability requires authorization to access SharePoint and create or modify content, but no additional user interaction is needed once the payload is stored. An attacker gains the ability to execute arbitrary actions in the context of other users' sessions.
Affected products
- Microsoft Office SharePoint
Timeline
- 2026-11-10: disclosed