Quantum Secular Labs / Blog / Advisories
CVE-2025-55182: Meta React Server Components Remote Code Execution Vulnerability
CVE-2025-55182 is rated critical with a CVSS v3.1 base score of 10.0 and affects Meta React Server Components, along with 1 other product in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-12-05, which means exploitation in the wild has been observed.
Vulnerability description
A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
Severity breakdown
CVSS v3.1 10.0: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Underlying weakness
CWE-502: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Affected products
- Facebook React: 19.0.0; 19.1.0; 19.1.1; 19.2.0
- Vercel Next.Js: from 15.0.0 before 15.0.5; from 15.1.0 before 15.1.9; from 15.2.0 before 15.2.6; from 15.3.0 before 15.3.6; from 15.4.0 before 15.4.8; from 15.5.0 before 15.5.7; from 16.0.0 before 16.0.7; 14.3.0 canary77; 14.3.0 canary78; 14.3.0 canary79; 14.3.0 canary80; 14.3.0 canary81
References
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
- http://www.openwall.com/lists/oss-security/2025/12/03/4
- https://www.facebook.com/security/advisories/cve-2025-55182
- https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182
- https://news.ycombinator.com/item?id=46136026