CVE-2021-39906
MEDIUM
6.1
CVSS Score
Published: November 4, 2021 at 11:04 PM UTC
Updated: June 17, 2026 at 04:04 AM UTC
1 product affected across 1 vendorGitLab
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Severity
MEDIUM6.1
Exploit prediction
EPSS 61%
Description
Improper validation of ipynb files in GitLab CE/EE version 13.5 and above allows an attacker to execute arbitrary JavaScript code on the victim's behalf.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 14.2.6v < 14.3.4v < 14.4.113.5.0 ≤ v < 14.2.614.3.0 ≤ v < 14.3.414.4.0 ≤ v < 14.4.1
Affected range stops below 14.2.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.3.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 14.4.1, 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-2021-39906.jsonx_refsource_MISCBroken Link
Source: [email protected]
https://gitlab.com/gitlab-org/gitlab/-/issues/341566x_refsource_MISCPermissions RequiredThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1347600CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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