CVE-2021-39889
MEDIUM
4.3
CVSS Score
Published: October 5, 2021 at 01:43 PM UTC
Updated: June 17, 2026 at 04:04 AM UTC
1 product affected across 1 vendorGitLab
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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.8%
Description
In all versions of GitLab EE since version 14.1, due to an insecure direct object reference vulnerability, an endpoint may reveal the protected branch name to a malicious user who makes a crafted API call with the ID of the protected branch.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 14.1.7v < 14.2.5v < 14.3.114.1.0 ≤ v < 14.1.714.2.0 ≤ v < 14.2.514.3.0 ≤ v < 14.3.1
Affected range stops below 14.1.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39889.jsonx_refsource_MISCBroken Link
Source: [email protected]
https://gitlab.com/gitlab-org/gitlab/-/issues/338062x_refsource_MISCPermissions RequiredThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1294017CVSS
4.3MEDIUMGitLab
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-639
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