Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated person bypass TeamCity account-creation restrictions on affected TeamCity 8 and 9 installations before 9.0.2. In business terms, an exposed CI server could allow unwanted user registration, creating a foothold into build, deployment, and source-code workflows.
Executive priority
Treat this as a targeted legacy CI/CD exposure issue. It is not listed as actively exploited in the provided sources, but unauthorized account creation on a build server can become a serious business risk if the service is internet-facing or connected to deployment pipelines.
Technical view
CVE-2015-1313 is an input-validation weakness in JetBrains TeamCity. Required request data for account creation could be inferred from HTML and JavaScript returned after an initial unauthenticated request, enabling restricted account creation to be bypassed. The bundle identifies TeamCity 8.0.1 and TeamCity 8 and 9 before 9.0.2.
Likely exposure
Exposure is likely limited to organizations still running TeamCity 8 or 9 before 9.0.2, especially where the TeamCity web interface is reachable by unauthenticated users. The provided sources do not identify current supported versions as affected.
Exploitation context
The source bundle does not cite CISA KEV listing, active exploitation, public exploit code, or mass scanning. The described issue requires unauthenticated access to TeamCity-delivered browser resources and a crafted account-creation request, but this analysis does not provide operational exploitation steps.
Researcher notes
Evidence is limited: no CVSS vector, no KEV status, and no detailed vendor advisory are included. The root condition is predictable or discoverable request data exposed through unauthenticated browser resources, mapped to CWE-20. Focus validation on version, web exposure, and account-creation behavior.
Mitigation direction
- Upgrade affected TeamCity 8 or 9 installations to 9.0.2 or later.
- Prefer a currently supported TeamCity release where feasible.
- Restrict TeamCity web access to trusted networks or authenticated access paths.
- Review vendor guidance before applying compensating controls.
- Audit newly created TeamCity accounts for unexpected or unauthorized users.
Validation and detection
- Inventory TeamCity servers and record exact versions.
- Confirm no production instance runs TeamCity 8 or 9 before 9.0.2.
- Check whether TeamCity is reachable without authentication from untrusted networks.
- Review account creation settings and recent user registrations.
- Verify remediation against JetBrains release or upgrade guidance.
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.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2015-1313 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://www.jetbrains.com/teamcity/download/CVE reference
- https://beyondbinary.io/articles/teamcity-account-creation/CVE reference
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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.