CVE-2024-27199
In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible
do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Can a WAF block it? Yes. The vulnerability involves path traversal via HTTP requests, which typically include ../ sequences in the URL path that are unusual and can be detected by a WAF rule to block such malicious requests. A WAF rule can match ../ sequences in the URL path. No tracked WAF vendor has published a rule for this CVE yet, so you would write it yourself.
What a custom rule would match: ../ sequences in the URL path
Also consider: patch · custom WAF rule · allow-list · canonical path validation
Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2024-27199 being exploited?
Yes. CVE-2024-27199 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2024-27199?
CVE-2024-27199 is rated High with a CVSS score of 7.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2024-27199?
Yes. A fix has been recorded for CVE-2024-27199. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2024-27199 affect?
CVE-2024-27199 affects jetbrains:teamcity. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
- affected< 2023.11.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
public exploits
Detection templates only, no public exploit found: 1 Nuclei template
- TeamCity < 2023.11.4 - Authentication Bypass · detection template · high
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- yes
- technical impact
- partial
Assessed by CISA 4 Mar 2024 (SSVC 2.0.3).
timeline
- 4 Mar 2024CISA SSVC assessment: exploitation active
- 4 Mar 2024Published · 1 day later
- 20 Apr 2026Added to CISA KEV (exploited in the wild) · 776 days (about 2 years) later
- 21 Apr 2026CVE record last updated · 1 day later
- 4 May 2026CISA remediation due date (US federal agencies) · 13 days later
- 2 Nov 2026Analysed by vulneraibility.com · 183 days (about 6 months) later
- Exploitgithub.com /Stuub/RCity-CVE-2024-27198/blob/main/RCity.py
- Linkjetbrains.com /privacy-security/issues-fixed/
- Linkdarkreading.com /cyberattacks-data-breaches/jetbrains-teamcity-mass-exploitation-underway-rogue-
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27199
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Nuclei templates: detection templates
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.