Security readout for executives and security teams
Plain-English summary
This CVE affects JetBrains TeamCity versions before 2020.2.4. The public description says file uploads were not checked sufficiently, which could create security risk on build infrastructure. The available sources do not provide severity, CVSS, impact details, or evidence of active exploitation.
Executive priority
Prioritize remediation if TeamCity supports production builds, deployments, or stores secrets. The public record lacks severity details, but CI/CD systems are high-value infrastructure, so affected versions should not remain in service without vendor-confirmed mitigation.
Technical view
CVE-2021-37547 is described as insufficient checks during file uploading in JetBrains TeamCity before 2020.2.4. Public CVE data does not list CWE, CVSS, privileges required, attack vector, or a detailed impact statement. Treat affected TeamCity servers as potentially vulnerable until upgraded or confirmed remediated by vendor guidance.
Likely exposure
Organizations running JetBrains TeamCity earlier than 2020.2.4 may be exposed. Risk is more relevant where TeamCity is internet-reachable, accessible to many users, or used in sensitive CI/CD workflows. The source bundle does not identify specific configurations required for exploitation.
Exploitation context
The source bundle does not cite active exploitation, public exploit availability, or CISA KEV inclusion. Because TeamCity often has access to source code, build secrets, and deployment paths, any upload validation weakness should be reviewed seriously despite incomplete public detail.
Researcher notes
Public evidence is sparse: the CVE description identifies the product, version boundary, and upload-check weakness, but not root cause, impact, or exploit prerequisites. Avoid assuming remote code execution, authentication bypass, or exploitability without additional vendor or advisory evidence.
Mitigation direction
- Upgrade TeamCity to 2020.2.4 or later where applicable.
- Review JetBrains’ security bulletin for official remediation guidance.
- Restrict TeamCity access to trusted users and networks.
- Review file upload permissions and remove unnecessary access.
Validation and detection
- Inventory all TeamCity servers and record installed versions.
- Confirm no TeamCity instance is running before 2020.2.4.
- Review TeamCity logs for unusual upload-related activity.
- Check whether any affected server is exposed to the internet.
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-2021-37547 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/blog/2021/08/05/jetbrains-security-bulletin-q2-2021/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.