CVE-2019-20097Network attack vector

Command execution via post-receive Git argument injection

Published Jan 15, 2020 · Updated Sep 16, 2024

Argument injection in Atlassian Bitbucket Server and Data Center allows remote authenticated users to execute arbitrary system commands. The post-receive hook passes specially crafted repository-file content as additional arguments to Git commands instead of treating it solely as data. Repository clone and push permission is required, although anonymous exploitation is possible when public project or repository access permits pushes.

CVSS severity8.8
High
EPSS probability2.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in Atlassian Bitbucket Server and Data Center allows remote authenticated users to execute arbitrary system commands. The post-receive hook passes specially crafted repository-file content as additional arguments to Git commands instead of treating it solely as data. Repository clone and push permission is required, although anonymous exploitation is possible when public project or repository access permits pushes.

The record

CVE
CVE-2019-20097
Published
Jan 15, 2020
Updated
Sep 16, 2024
Vendor
Atlassian
Product
Bitbucket Server
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0 <unspecified
  2. Affected versionversion=6.0 <unspecified
  3. Affected versionversion=6.1.0 <unspecified
  4. Affected versionversion=6.2.0 <unspecified
  5. Affected versionversion=6.3.0 <unspecified
  6. Affected versionversion=6.4.0 <unspecified
  7. Affected versionversion=6.5.0 <unspecified
  8. Affected versionversion=6.6.0 <unspecified
  9. Affected versionversion=6.7.0 <unspecified
  10. Affected versionversion=6.8.0 <unspecified
  11. Affected versionversion=6.9.0 <unspecified
  12. Affected versionversion=unspecified <5.16.11
  13. Affected versionversion=unspecified <6.0.11
  14. Affected versionversion=unspecified <6.1.9
  15. Affected versionversion=unspecified <6.2.7
  16. Affected versionversion=unspecified <6.3.6
  17. Affected versionversion=unspecified <6.4.4
  18. Affected versionversion=unspecified <6.5.3
  19. Affected versionversion=unspecified <6.6.3
  20. Affected versionversion=unspecified <6.7.3
  21. Affected versionversion=unspecified <6.8.2
  22. Affected versionversion=unspecified <6.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Bitbucket Serverversion=1.0 <unspecified; version=6.0 <unspecified; version=6.1.0 <unspecified; version=6.2.0 <unspecified; version=6.3.0 <unspecified; version=6.4.0 <unspecified; version=6.5.0 <unspecified; version=6.6.0 <unspecified; version=6.7.0 <unspecified; version=6.8.0 <unspecified; version=6.9.0 <unspecified; version=unspecified <5.16.11; version=unspecified <6.0.11; version=unspecified <6.1.9; version=unspecified <6.2.7; version=unspecified <6.3.6; version=unspecified <6.4.4; version=unspecified <6.5.3; version=unspecified <6.6.3; version=unspecified <6.7.3; version=unspecified <6.8.2; version=unspecified <6.9.1
Atlassian · Bitbucket Data Centerversion=1.0 <unspecified; version=6.0 <unspecified; version=6.1.0 <unspecified; version=6.2.0 <unspecified; version=6.3.0 <unspecified; version=6.4.0 <unspecified; version=6.5.0 <unspecified; version=6.6.0 <unspecified; version=6.7.0 <unspecified; version=6.8.0 <unspecified; version=6.9.0 <unspecified; version=unspecified <5.16.11; version=unspecified <6.0.11; version=unspecified <6.1.9; version=unspecified <6.2.7; version=unspecified <6.3.6; version=unspecified <6.4.4; version=unspecified <6.5.3; version=unspecified <6.6.3; version=unspecified <6.7.3; version=unspecified <6.8.2; version=unspecified <6.9.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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