CVE-2017-18037

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-02 · updated 2026-06-17
Weakness: CWE-22

Description

The git repository tag rest resource in Atlassian Bitbucket Server from version 3.7.0 before 4.14.11 (the fixed version for 4.14.x), from version 5.0.0 before 5.0.9 (the fixed version for 5.0.x), from version 5.1.0 before 5.1.8 (the fixed version for 5.1.x), from version 5.2.0 before 5.2.6 (the fixed version for 5.2.x), from version 5.3.0 before 5.3.4 (the fixed version for 5.3.x), from version 5.4.0 before 5.4.2 (the fixed version for 5.4.x), from version 5.5.0 before 5.5.1 (the fixed version for 5.5.x) and before 5.6.0 allows remote attackers to read arbitrary files via a path traversal vulnerability through the name of a git tag.

Affected products

Atlassian Bitbucket Server: from 3.7.0 before 4.14.11; from 5.0.0 before 5.0.9; from 5.1.0 before 5.1.8; from 5.2.0 before 5.2.6; from 5.3.0 before 5.3.4; from 5.4.0 before 5.4.2 — fixed in 4.14.11, 5.0.9, 5.1.8, 5.2.6, 5.3.4, 5.4.2

How to fix

Upgrade to a fixed version: Atlassian Bitbucket Server 4.14.11, 5.0.9, 5.1.8, 5.2.6. Check the vendor advisory for mitigations.

References

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