CVE-2019-20097

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-15 · updated 2026-06-17

Description

Bitbucket Server and Bitbucket Data Center versions starting from 1.0.0 before 5.16.11, from version 6.0.0 before 6.0.11, from version 6.1.0 before 6.1.9, from version 6.2.0 before 6.2.7, from version 6.3.0 before 6.3.6, from version 6.4.0 before 6.4.4, from version 6.5.0 before 6.5.3, from version 6.6.0 before 6.6.3, from version 6.7.0 before 6.7.3, from version 6.8.0 before 6.8.2, from version 6.9.0 before 6.9.1 had a Remote Code Execution vulnerability via the post-receive hook. A remote attacker with permission to clone and push files to a repository on the victim's Bitbucket Server or Bitbucket Data Center instance, can exploit this vulnerability to execute arbitrary commands on the Bitbucket Server or Bitbucket Data Center systems, using a file with specially crafted content.

Affected products

Atlassian Bitbucket Server: from 1.0.0 before 5.6.11; from 6.0.0 before 6.0.11; from 6.1.0 before 6.1.9; from 6.2.0 before 6.2.7; from 6.3.0 before 6.3.6; from 6.4.0 before 6.4.4 — fixed in 5.6.11, 6.0.11, 6.1.9, 6.2.7, 6.3.6, 6.4.4

How to fix

Upgrade to a fixed version: Atlassian Bitbucket Server 5.6.11, 6.0.11, 6.1.9, 6.2.7. Check the vendor advisory for mitigations.

References

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