What is CVE-2019-0777?

CVE-2019-0777 is a medium-severity vulnerability in Microsoft Team Foundation Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-04-09.

How severe is CVE-2019-0777?

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

XSS in Microsoft Team Foundation Server

CVE-2019-0777

A Cross-site Scripting (XSS) vulnerability exists when Team Foundation Server does not properly sanitize user provided input, aka 'Team Foundation Server Cross-site Scripting Vulnerability'.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-04-09 · 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 (76.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.3% 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 Team Foundation Server — versions 2017 Update 3.1
Microsoft Team Foundation Server — versions 2017, 2018
Microsoft Team Foundation Server 2018 — versions Update 1.2, Update 3.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0777 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-0777?: CVE-2019-0777 is a medium-severity vulnerability in Microsoft Team Foundation Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-04-09.
How severe is CVE-2019-0777?: Medium severity. CVSS v3 base score is 5.4 out of 10.