What is CVE-2016-4320?

CVE-2016-4320 is a medium-severity vulnerability in Atlassian Bitbucket, classified under Path Traversal. CVSS score: 4.3/10. Published 2017-04-10.

How severe is CVE-2016-4320?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Path Traversal in Atlassian Bitbucket

CVE-2016-4320

Atlassian Bitbucket Server before 4.7.1 allows remote attackers to read the first line of an arbitrary file via a directory traversal attack on the pull requests resource.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2017-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.018 (77.6th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Atlassian Bitbucket
Atlassian Bitbucket Server Before 4.7.1 — versions Atlassian Bitbucket Server before 4.7.1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

jira.atlassian.com/browse/BSERV-8819 (Issue Tracking, Vendor Advisory)
www.securityfocus.com/bid/97515 (VDB Entry, Third Party Advisory, vdb-entry)
confluence.atlassian.com/bitbucketserver/bitbucket-server-4-7-release-notes-829… (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4320?: CVE-2016-4320 is a medium-severity vulnerability in Atlassian Bitbucket, classified under Path Traversal. CVSS score: 4.3/10. Published 2017-04-10.
How severe is CVE-2016-4320?: Medium severity. CVSS v3 base score is 4.3 out of 10.