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% (75th 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% (75th 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% (75th 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:*:*:*:*:*:*:*:*

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