CVE-2024-27199: JetBrains TeamCity Relative Path Traversal Vulnerability

What it is

In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible

Description quoted from the CVE record (assigned by JetBrains, published 2024-03-04).

Weakness: CWE-23

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality low, integrity low, availability low. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: yes. Technical impact: partial.

On CISA KEV since

2026-04-20

US federal deadline

2026-05-04

Ransomware use

Yes

Public exploit evidence (Exploit Observer)

Also known as: BDU:2024-02014, CNNVD-202403-297, EUVD-2024-24438, GHSA-m7gg-q7qj-3r2r

VEDAS cluster: VEDAS:CELESTIALCALM

Exploit Observer links 7 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (7)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

• Nuclei template: https://raw.githubusercontent.com/projectdiscovery/nuclei-templates/main/http/cves/2024/CVE-2024-27199.yaml
• Code repository: https://github.com/stuub/rcity-cve-2024-27199
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2024/CVE-2024-27199.yaml
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/nuclei/2024/CVE-2024-27199.yaml
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2024/CVE-2024-27199.rules
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2024/CVE-2024-27199.rules
• Code repository: https://raw.githubusercontent.com/ARPSyndicate/vedas-signatures/main/suricata/2024/CVE-2024-27199.rules

Research and write-ups (2)

• Research or write-up: https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now
• Research or write-up: https://www.rapid7.com/db/vulnerabilities/jetbrains-teamcity-cve-2024-27199

Vulnerability databases and vendor advisories (6)

Catalogue entries, not exploit evidence.

• Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2024-24438
• Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-m7gg-q7qj-3r2r
• Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-27199
• Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27199
• Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202403-297
• Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2024-27199

173 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS

1.000
very likely to be attacked soon

VEDAS

0.980
strong exploit evidence

On CISA KEV

Yes, since 2026-04-20

Detection rule

Nuclei · Suricata

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish. The vertical line is the day CISA added it to its exploited list.

VEDAS flagged this bug about 246 days before CISA confirmed attacks.

Who is affected

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: jetbrains teamcity.

How to fix it

Fixed versions stated in the CVE record: 2023.11.4.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

• https://www.jetbrains.com/privacy-security/issues-fixed/
• https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now/
• https://nvd.nist.gov/vuln/detail/CVE-2024-27199

How to detect it

Nuclei template (active check)

JetBrains TeamCity - Path Traversal

In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible

Name and description quoted from the template, written by VEDAS.

The template sends 3 requests (GET /res/../admin/diagnostic.jsp, GET /.well-known/acme-challenge/../../admin/diagnostic.jsp, GET /update/../admin/diagnostic.jsp); it decides using dsl matchers. Severity in the template: high. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

nuclei -u https://your-host -t CVE-2024-27199.yaml

id: CVE-2024-27199

info:
  name: "JetBrains TeamCity - Path Traversal"
  author: vedas-arpsyndicate
  severity: high
  description: |
    In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible
  reference:
    - https://www.exploit.observer/?keyword=CVE-2024-27199&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=teamcity&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
    cvss-score: 7.3
    cve-id: CVE-2024-27199
    cwe-id: CWE-23
  metadata:
    verified: false
  tags: cve,cve2024,teamcity,jetbrains,auth-bypass,vkev,vuln,kev
http:
  - method: GET
    path:
      - "{{BaseURL}}/res/../admin/diagnostic.jsp"
      - "{{BaseURL}}/.well-known/acme-challenge/../../admin/diagnostic.jsp"
      - "{{BaseURL}}/update/../admin/diagnostic.jsp"

    stop-at-first-match: true
    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(header, "text/html")'
          - 'contains_all(body, "Debug Logging", "CPU & Memory Usage")'
        condition: and

CVE-2024-27199.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2024-27199 JetBrains TeamCity - Path Traversal. Add them to your Suricata rule set and reload.

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2024-27199 JetBrains TeamCity - Path Traversal"; flow:established,to_server; http.uri; content:"diagnostic.jsp"; nocase; content:"../"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2024-27199; reference:url,https://www.exploit.observer/?keyword=CVE-2024-27199&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=teamcity&match=exact; sid:1009361; rev:1;)

CVE-2024-27199.rules on GitHub

References

Exploits and technical analysis

• https://github.com/Stuub/RCity-CVE-2024-27198/blob/main/RCity.py (exploit)

Government sources

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27199 (government-resource)

Other references

• https://www.jetbrains.com/privacy-security/issues-fixed/
• https://www.darkreading.com/cyberattacks-data-breaches/jetbrains-teamcity-mass-exploitation-underway-rogue-accounts-thrive

Other databases

• CVE record (cve.org)
• NVD
• Exploit Observer

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.