CVE-2023-42793 (GCVE-0-2023-42793)
Vulnerability from cvelistv5 – Published: 2023-09-19 16:57 – Updated: 2025-10-21 23:05Summary
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-12-13 18:39 UTC
CWE
Assigner
References
8 references
Impacted products
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c6c25357-f662-4864-a440-1362c693b848
Exploited: Yes
Timestamps
First Seen: 2023-10-04
Asserted: 2023-10-04
Scope
Notes: JetBrains TeamCity Authentication Bypass Vulnerability | Affected: JetBrains / TeamCity | Description: JetBrains TeamCity contains an authentication bypass vulnerability that allows for remote code execution on TeamCity Server. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-10-25 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://blog.jetbrains.com/teamcity/2023/09/critical-security-issue-affecting-teamcity-on-premises-update-to-2023-05-4-now/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-42793
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-288 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | TeamCity |
| Due Date | 2023-10-25 |
| Date Added | 2023-10-04 |
| Vendorproject | JetBrains |
| Vulnerabilityname | JetBrains TeamCity Authentication Bypass Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 998cf57f-3a30-490d-8624-b7cad17b78e6
Exploited: Yes
Timestamps
First Seen: 2023-10-04
Asserted: 2023-10-04
Scope
Notes: In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible | Affected: JetBrains / TeamCity | CVSS: 9.8 (CRITICAL) | EPSS: 0.99988 | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible |
| Cve Id | CVE-2023-42793 |
| Vendor | JetBrains |
| Ghsa Id | None |
| Product | TeamCity |
| Added Date | 2023-10-04T00:00:00.000Z |
| Cvss Score | 9.8 |
| Epss Score | 0.99988 |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.99984 |
| Used In Malware | yes |
| Vulnerability Id | CVE-2023-42793 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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