Security readout for executives and security teams
Plain-English summary
CVE-2021-31905 is an information disclosure issue in JetBrains YouTrack before version 2020.6.8801. The available sources say issue previews could expose information, but do not describe the data type, attacker prerequisites, or business impact. Treat exposure as relevant where older YouTrack instances manage sensitive projects, tickets, or customer details.
Executive priority
Prioritize version verification and upgrade planning. Business urgency depends on whether older YouTrack instances contain sensitive issue data and who can access them.
Technical view
The record describes information disclosure through a YouTrack issue preview in versions before 2020.6.8801. No CVSS score, CWE, exploit details, or affected CPEs are provided in the bundle. The most concrete remediation signal is the fixed version boundary in the CVE description and JetBrains security bulletin reference.
Likely exposure
Exposure is most likely for organizations running JetBrains YouTrack earlier than 2020.6.8801, especially internet-accessible or broadly accessible instances containing sensitive issue data.
Exploitation context
The provided bundle does not report active exploitation, and KEV is false. Public evidence here is limited to an information disclosure description and JetBrains bulletin reference.
Researcher notes
Evidence is incomplete: no CVSS, CWE, exploitability detail, affected CPEs, or data exposure specifics are included. Avoid assuming unauthenticated access or active exploitation without additional vendor evidence.
Mitigation direction
- Upgrade YouTrack to version 2020.6.8801 or later.
- Review JetBrains security bulletin guidance for any deployment-specific instructions.
- Restrict YouTrack access to authorized users while legacy versions are investigated.
- Review project and issue permissions for unnecessary broad visibility.
Validation and detection
- Inventory all YouTrack instances and record exact running versions.
- Confirm no production instance is older than 2020.6.8801.
- Check whether issue data includes customer, security, or regulated information.
- Review access logs for unusual preview or issue access patterns.
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-2021-31905 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.