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CVE-2023-42793

99
FAUCET Score

CVE-2023-42793 is a critical authentication bypass vulnerability affecting JetBrains TeamCity servers prior to version 2023.05.4, allowing unauthenticated remote code execution (RCE). With a CVSS score of 9.8, this flaw presents a severe risk as it requires no user interaction or privileges and can lead to complete compromise of the affected system. This vulnerability is actively exploited in the wild, including by ransomware campaigns and state-sponsored actors, with multiple public exploit modules and extensive community discussion and media coverage highlighting its significant threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 2023.05.4CPE matchmatch criteria
cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*
>= 0, < 2023.05.4CPE match
cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.98%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Oct 4, 2023
Metasploit: JetBrains TeamCity Unauthenticated Remote Code Execution · Sep 19, 2023
Nuclei: CVE-2023-42793 · Sep 27, 2023
ExploitDB: EDB-51884 · Mar 14, 2024
This CVE's current EPSS score of 0.9998 is in the 100th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
attackerkb.com / topics/1XEEEkGHzt/cve-2023-42793
Third Party Advisory
blog.jetbrains.com / teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem
Vendor Advisory
jetbrains.com / privacy-security/issues-fixed
Vendor Advisory
rapid7.com / blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers
Broken LinkThird Party Advisory
securityweek.com / recently-patched-teamcity-vulnerability-exploited-to-hack-servers
Press/Media Coverage
sonarsource.com / blog/teamcity-vulnerability
ExploitThird Party Advisory