What is CVE-2017-8551?

CVE-2017-8551 is a medium-severity vulnerability in Microsoft Project Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-06-15.

How severe is CVE-2017-8551?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Microsoft Project Server

CVE-2017-8551

An elevation of privilege vulnerability exists when Microsoft SharePoint software fails to properly sanitize a specially crafted requests, aka "Microsoft SharePoint XSS vulnerability".

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.033 (88.2th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Microsoft Project Server — versions 2013
Microsoft Corporation Sharepoint — versions Microsoft Project Server 2013 Service Pack 1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8551 (Patch, Vendor Advisory)
www.securitytracker.com/id/1038663 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/98913 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-8551?: CVE-2017-8551 is a medium-severity vulnerability in Microsoft Project Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-06-15.
How severe is CVE-2017-8551?: Medium severity. CVSS v3 base score is 6.1 out of 10.