What is CVE-2017-0255?

CVE-2017-0255 is a medium-severity vulnerability in Microsoft Sharepoint Foundation, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-05-12.

How severe is CVE-2017-0255?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Microsoft Sharepoint Foundation

CVE-2017-0255

Microsoft SharePoint Foundation 2013 SP1 allows an elevation of privilege vulnerability when it does not properly sanitize a specially crafted web request, aka "Microsoft SharePoint XSS Vulnerability".

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.017 (76.8th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Microsoft Sharepoint Foundation — versions 2013
Microsoft Corporation Office — versions Microsoft SharePoint Foundation 2013 SP1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/bid/98107 (VDB Entry, Third Party Advisory, vdb-entry)
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0255 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-0255?: CVE-2017-0255 is a medium-severity vulnerability in Microsoft Sharepoint Foundation, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-05-12.
How severe is CVE-2017-0255?: Medium severity. CVSS v3 base score is 5.4 out of 10.