CVE-2025-11953
The Metro Development Server, which is opened by the React Native Community CLI, binds to external interfaces by default. The server exposes an endpoint that is vulnerable to OS command injection. This allows unauthenticated network attackers to send a POST request to the server and run arbitrary executables. On Windows, the attackers can also execute arbitrary shell commands with fully controlled arguments.
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? Partly. Cloudflare publishes WAF a rule written for this CVE. Such rules block the known exploit requests and buy time, but attackers can change the request to get past them, so they do not replace the patch.
Cloudflare · 1 rule (Block) · since 5 Nov 2025
- React Native Metro - Command Injection - CVE:CVE-2025-11953 · Cloudflare Managed Ruleset
Also consider: patch · enable the vendor rule in block mode · shlex/execve-style APIs
Based on WAF vendor rules published for this CVE. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2025-11953 being exploited?
Yes. CVE-2025-11953 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-2025-11953?
CVE-2025-11953 is rated Critical with a CVSS score of 9.8. 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-2025-11953?
Yes. A fix has been recorded for CVE-2025-11953. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-11953 affect?
CVE-2025-11953 affects react-native-community:react_native_community_cli. 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.
public exploits
Unvetted proof-of-concept code on GitHub: 3 GitHub proofs of concept · 1 Nuclei template
- React Native Community CLI - Unauthenticated OS Command Injection · detection template · critical
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
- total
Assessed by CISA 6 Feb 2026 (SSVC 2.0.3).
timeline
- 3 Nov 2025Published
- 4 Nov 2025First proof-of-concept repository on GitHub (unvetted) · same day later
- 5 Feb 2026Added to CISA KEV (exploited in the wild) · 93 days (about 3 months) later
- 6 Feb 2026CISA SSVC assessment: exploitation active · 1 day later
- 26 Feb 2026CISA remediation due date (US federal agencies) · 20 days later
- 26 Feb 2026CVE record last updated · 1 day later
- 2 Nov 2026Analysed by vulneraibility.com · 249 days (about 8 months) later
also known as
- Advisoryvulncheck.com /blog/metro4shell_eitw
- Patchgithub.com /react-native-community/cli/commit/15089907d1f1301b22c72d7f68846a2ef20df547
- Linkjfrog.com /blog/cve-2025-11953-critical-react-native-community-cli-vulnerability
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-11953
- Linkx.com /SzymonRybczak/status/1986199665000566848
- Linkx.com /thymikee/status/1986770875954475375
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
- PoC-in-GitHub: GitHub repositories that claim a proof of concept
- OSV: advisory aliases and downstream package versions
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.