Security readout for executives and security teams
Plain-English summary
JetBrains Hub versions before 2021.1.13079 may not have correctly applied two-factor authentication to the All Users group. In plain terms, an organization could believe MFA protected everyone while some users were not actually covered.
Executive priority
Treat this as a targeted authentication-control gap. Prioritize if JetBrains Hub supports sensitive engineering workflows, user identity, or administrative access, but note that public evidence does not establish active exploitation.
Technical view
CVE-2021-31901 is an authentication enforcement issue in JetBrains Hub before 2021.1.13079. The sources state that two-factor authentication was not enabled properly for the All Users group. No CVSS, CWE, exploit mechanics, or detailed impact data are provided.
Likely exposure
Exposure is limited to organizations running JetBrains Hub before 2021.1.13079, especially where the All Users group was used to enforce two-factor authentication globally.
Exploitation context
The provided sources do not show CISA KEV listing, active exploitation, public exploit details, or weaponized guidance. Risk comes from weakened authentication controls rather than a documented remote exploit path.
Researcher notes
The public bundle is sparse: affected version threshold is clear, but severity, CVSS, CWE, and exploitability details are absent. Validate through version review and effective policy testing, not assumptions about exploit mechanics.
Mitigation direction
- Upgrade JetBrains Hub to 2021.1.13079 or later.
- Review JetBrains security bulletin and current vendor guidance.
- Recheck 2FA policy enforcement for the All Users group.
- Confirm privileged accounts have separate, explicit MFA enforcement.
Validation and detection
- Inventory all JetBrains Hub instances and versions.
- Verify no Hub instance is older than 2021.1.13079.
- Confirm effective 2FA coverage for All Users group members.
- Review authentication logs for unexpected non-2FA access.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-31901 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://blog.jetbrains.com/CVE reference · x_refsource_MISC
- https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.