Security readout for executives and security teams
Plain-English summary
TeamCity versions before 2020.1.5 could fail to hide secure dependency parameters in some depending builds. In plain terms, secrets intended to be masked might become visible to people who can view affected build output or metadata. The public sources do not provide a CVSS score or confirmed exploitation evidence.
Executive priority
Prioritize remediation if TeamCity handles production credentials, deployment tokens, or cloud secrets. Without exploitation evidence or severity scoring, treat this as a controlled upgrade and credential-exposure review rather than a confirmed emergency.
Technical view
The issue affects JetBrains TeamCity before 2020.1.5. When depending builds had no internal artifacts, secure dependency parameters could be not masked. The disclosed impact is potential exposure of sensitive CI/CD parameters, but the source bundle does not identify affected CPEs, CWE, exploit prerequisites, or a CVSS vector.
Likely exposure
Organizations using JetBrains TeamCity before 2020.1.5 and passing secure dependency parameters between builds may be exposed, especially where many users can view build results. Exposure depends on CI configuration and whether affected build outputs retained unmasked values.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. This appears to be an information disclosure weakness in CI/CD visibility rather than a public remote-code-execution issue, based only on the provided sources.
Researcher notes
Key missing evidence includes CVSS, CWE, affected CPEs, detailed trigger conditions, and exploit status. The phrase “when there are no internal artifacts” is important for scoping validation. Avoid assuming broader TeamCity exposure beyond versions before 2020.1.5.
Mitigation direction
- Upgrade TeamCity to version 2020.1.5 or later.
- Review JetBrains security bulletin guidance for this CVE.
- Restrict build log and metadata access to trusted users.
- Rotate secrets if unmasked values may have been exposed.
- Review dependent build configurations using secure parameters.
Validation and detection
- Inventory TeamCity servers and confirm versions are before or after 2020.1.5.
- Identify builds using secure dependency parameters.
- Check affected build logs and metadata for unmasked secret values.
- Confirm access controls around historical build results.
- Retest masking behavior after upgrade using non-sensitive test parameters.
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-2020-27629 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/2020/11/16/jetbrains-security-bulletin-q3-2020/CVE reference · x_refsource_CONFIRM
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.