CVE-2023-42793
Confirmed PUBLISHEDIn JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
- CVE Published
- Sep 19, 2023
- Exploitation Reported
- Oct 04, 2023
- CVSS
- 9.8 Critical
- EPSS
- 100.0%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| JetBrains |
TeamCity
|
0 to < 2023.05.4 |
Affected |
CVE References
- jetbrains.com/privacy-security/issues-fixed jetbrains.com · CVE Record https://www.jetbrains.com/privacy-security/issues-fixed/
- blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerabilit... blog.jetbrains.com · CVE Record https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerabil...
- packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthentica... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauth...
- attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793 attackerkb.com · CVE Record https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
- securityweek.com/recently-patched-teamcity-vulnerability-expl... securityweek.com · CVE Record https://www.securityweek.com/recently-patched-teamcity-vulnerability-...
Show 2 more references
- rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-crit... rapid7.com · CVE Record https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critic...
- sonarsource.com/blog/teamcity-vulnerability sonarsource.com · CVE Record https://www.sonarsource.com/blog/teamcity-vulnerability/
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2023-10-04 00:00 UTC |
| Tenable Blog | 2026-06-02 14:21 UTC |
| The Shadowserver | 2026-06-04 00:00 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-42793.yaml | Apr 25, 2025 |
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/jetbrains_teamcity_rce_cve_2023_42793.rb | Apr 28, 2025 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2023-10-04 00:00:00 UTC · CISA
Used in malware
Recorded 2023-10-04 00:00:00 UTC · CISA
Proof of concept available
Recorded 2023-09-29 06:43:35 UTC · GitHub
Weaknesses (CWE)
-
Authentication Bypass Using an Alternate Path or Channel
-
Missing Authentication for Critical Function
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/jetbrains_teamcity_rce_cve_2023_42793.rb | Apr 28, 2025 |
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-42793.yaml | Apr 25, 2025 |
| Nessus | https://www.tenable.com/plugins/nessus/182690 | Oct 06, 2023 |
Recent Mentions
Tenable Blog · May 27, 2026
Tenable Research has developed a graph-based model linking 600+ threat groups to real-world customer exposures. It reveals which vulnerabilities sit at the intersection of severity, active exploitation, and organizational risk.Key takeawaysThe "patch everything" strategy is dead: Vulnerability prioritization based on exploitation risk offers a path forward. A directed graph model linking 600+ threat actors to vulnerabilities in 7,800 customer environments reveals that 68% of organizations carry at least one CVE previously exploited by a named adversary, and 321 tracked threat groups can reach at least one customer environment through an active vulnerability. Prevalence of "Elite Arsenal" CVEs requires immediate attention: The 242 "Elite Arsenal" CVEs — those meeting all three criteria of critical VPR (≥ 9), CISA KEV listing, and documented threat group exploitation — are nearly universally present across the studied customer base, with 241 of 242 actively detected. More than half are five or more years old, and 78% of the persistently exploited core are simultaneously weaponized by nation-state APTs, commodity malware operators, and ransomware gangs. Non-CVE exposures are universally dangerous: Non-CVE exposures, including misconfigurations, weak credentials, and end-of-life software, are present in virtually 100% of studied organizations, with 60% carrying at least one that maps to a tracked threat actor's preferred techniques. Preliminary modeling suggests these exposures may confer more breach risk than CVE-linked findings, yet no industry-standard scoring infrastructure exists to prioritize them.While the first two posts in this blog series documented the accelerating vulnerability flood and the widening remediation gap, today we answer the outstanding question: Where do these forces actually collide inside customer environments? Using a directed graph model that maps more than 600 tracked threat groups to vulnerabilities observed across 7,800 organizations,...
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2024-10-08 06:33:06 UTC · 0 stars
TeamCity server scanner to detect CVE-2023-42793
github · Created 2024-07-05 17:39:25 UTC · 1 stars
TeamCity RCE for Linux (CVE-2023-42793)
github · Created 2024-04-24 16:33:20 UTC · 7 stars
JetBrains TeamCity 2023.05.3 - Remote Code Execution (RCE), CVE-2023-42793
github · Created 2024-04-21 13:52:28 UTC · 2 stars
JetBrains TeamCity Unauthenticated Remote Code Execution - Python3 Implementation
github · Created 2023-09-29 06:43:35 UTC · 43 stars
JetBrains TeamCity Authentication Bypass CVE-2023-42793 Exploit
nuclei · Created Unknown
metasploit · Created Unknown
Metasploit module for CVE-2023-42793
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC about 2 months ago00:00 UTC · about 2 months ago
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
14:21 UTC about 2 months ago14:21 UTC · about 2 months ago
KEV confirmed by Tenable Blog
Exploitation attested by an external source
-
15:02 UTC about 1 year ago15:02 UTC · about 1 year ago
Metasploit module available
Exploit module available
-
00:00 UTC about 1 year ago00:00 UTC · about 1 year ago
Nuclei template available
Scanner coverage available
-
22:24 UTC almost 3 years ago22:24 UTC · almost 3 years ago
Nessus plugin available
Scanner coverage available
-
00:00 UTC almost 3 years ago00:00 UTC · almost 3 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
00:00 UTC almost 3 years ago00:00 UTC · almost 3 years ago
First public exploitation report
Exploit observed in malware
-
06:43 UTC almost 3 years ago06:43 UTC · almost 3 years ago
Public PoC available
Public proof-of-concept code published
-
16:57 UTC almost 3 years ago16:57 UTC · almost 3 years ago
CVE published
Vulnerability disclosed publicly
-
09:48 UTC almost 3 years ago09:48 UTC · almost 3 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2023-42793
{
"cve_id": "CVE-2023-42793",
"title": "In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE o...",
"affected_vendor": "JetBrains",
"affected_product": "TeamCity",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.8,
"epss_score": 0.99979,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}