CVE-2021-39871
MEDIUMCVSS 4.3/10EPSS 0.90%
Last modified
CVE-2021-39871 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. In all versions of GitLab CE/EE since version 13.0, an instance that has the setting to disable Bitbucket Server import enabled is bypassed by an attacker making a crafted API call.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.
Description
In all versions of GitLab CE/EE since version 13.0, an instance that has the setting to disable Bitbucket Server import enabled is bypassed by an attacker making a crafted API call.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 13.0.0, < 14.1.7 |
| Gitlab | Gitlab | >= 14.2.0, < 14.2.5 |
| Gitlab | Gitlab | 4.3.0 |
References
- https://hackerone.com/reports/630263Permissions Required, Third Party Advisory
- https://hackerone.com/reports/630263Permissions Required, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-39871?
In all versions of GitLab CE/EE since version 13.0, an instance that has the setting to disable Bitbucket Server import enabled is bypassed by an attacker making a crafted API call.
How severe is CVE-2021-39871?
CVE-2021-39871 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.
How do I fix CVE-2021-39871?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-39866A business logic error in the project deletion process in Gi…5.4
- CVE-2021-39867In all versions of GitLab CE/EE since version 8.15, a DNS re…8.1
- CVE-2021-39868In all versions of GitLab CE/EE since version 8.12, an authe…4.3
- CVE-2021-39869In all versions of GitLab CE/EE since version 8.9, project e…6.5
- CVE-2021-3987An improper access control vulnerability exists in janeczku/…4.3
- CVE-2021-39870In all versions of GitLab CE/EE since version 11.11, an inst…4.3
- CVE-2021-39872In all versions of GitLab CE/EE since version 14.1, an impro…6.5
- CVE-2021-39873In all versions of GitLab CE/EE, there exists a content spoo…4.3
- CVE-2021-39874In all versions of GitLab CE/EE since version 11.0, the requ…4.3
- CVE-2021-39875In all versions of GitLab CE/EE since version 13.6, it is po…5.3
- CVE-2021-39876In all versions of GitLab CE/EE since version 11.3, the endp…4.3
- CVE-2021-39877A vulnerability was discovered in GitLab starting with versi…5.5
Are you affected by CVE-2021-39871?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST