SECURELYN

CVE-2026-20945

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.

Scores

5.4
CVSS 5.4 out of 10, medium severity.
19.1%
EPSS 19.1% chance of exploitation in the next 30 days.

The facts

Published
14 April 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
Medium, CVSS 5.4 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
Affects
  • microsoft sharepoint server
Known exploited
Not in the CISA Known Exploited Vulnerabilities catalogue in this build.
EPSS
19.1% chance of exploitation activity in the next 30 days (percentile 97).

Is there a Securelyn advisory?

Not yet. Securelyn writes plain-English advisories for the flaws that matter most to businesses. Subscribe to the digest to hear about them.

References