How severe is CVE-2016-4320?

CVE-2016-4320 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2016-4320 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4320?

CVE-2016-4320 affects Atlassian Bitbucket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4320?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4320 published?

CVE-2016-4320 was published on 2017-04-10 and last updated on 2026-06-17.

CVE-2016-4320

CVE-2016-4320 is a medium-severity vulnerability in Atlassian Bitbucket with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Atlassian Bitbucket
Published: 2017-04-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2016-4320?: CVE-2016-4320 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2016-4320 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4320?: CVE-2016-4320 affects Atlassian Bitbucket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4320?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4320 published?: CVE-2016-4320 was published on 2017-04-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:atlassian:bitbucket:*:*:*:*:*:*:*:*

More vulnerabilities in Atlassian Bitbucket

CVE-2018-5225 — Critical (CVSS 9.9): In browser editing in Atlassian Bitbucket Server from version 4.13.0 before 5.4.8 (the fixed version for 4.13.0 through…
CVE-2022-43781 — Critical (CVSS 9.8): There is a command injection vulnerability using environment variables in Bitbucket Server and Data Center. An attacker…
CVE-2022-26136 — Critical (CVSS 9.8): A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used…
CVE-2019-15000 — Critical (CVSS 9.8): The commit diff rest endpoint in Bitbucket Server and Data Center before 5.16.10 (the fixed version for 5.16.x ), from…
CVE-2019-3397 — Critical (CVSS 9.1): Atlassian Bitbucket Data Center licensed instances starting with version 5.13.0 before 5.13.6 (the fixed version for…
CVE-2022-36804 — High (CVSS 8.8): Multiple API endpoints in Atlassian Bitbucket Server and Data Center 7.0.0 before version 7.6.17, from version 7.7.0…

All CVEs affecting Atlassian Bitbucket →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-76606 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Path Traversal via image element in Fabrik < 4.7.3 - ???.
CVE-2026-18051 — Critical (CVSS 10.0): The W3 Total Cache WordPress plugin before 2.10.5 does not properly validate the request path it uses to build cache…
CVE-2026-74764 — Critical (CVSS 10.0): Pandora contains a path traversal vulnerability in its TAR archive extraction functionality. When processing a…
CVE-2026-16940 — Critical (CVSS 10.0): The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing…
CVE-2026-67429 — Critical (CVSS 10.0): Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, image.download and related…
CVE-2026-59555 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Deletion in Participants Database <= 2.7.8.3 versions.

Browse all CWE-22 (Path Traversal) vulnerabilities →