Actively exploited · Published Dec 3, 2025 · Assigned by Meta
CVE-2025-55182
Critical 10.0 Exploited Ransomware
In plain English
A critical-severity unsafe deserialization in react-server-dom-parcel from Meta. Attackers are actively exploiting it in the wild (listed by CISA on December 5, 2025). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 99.7% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Dec 12, 2025.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | react-server-dom-parcel | 19.2.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-parcel | 19.0.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-parcel | 19.1.2 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-turbopack | 19.1.2 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-turbopack | 19.0.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-turbopack | 19.2.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-webpack | 19.0.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-webpack | 19.2.1 | GHSA-fv66-9v8q-g76r |
| npm | react-server-dom-webpack | 19.1.2 | GHSA-fv66-9v8q-g76r |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Meta | react-server-dom-webpack | 19.0.0 – through 19.0.019.1.0 – through 19.1.119.2.0 – through 19.2.0 |
| Meta | react-server-dom-turbopack | 19.0.0 – through 19.0.019.1.0 – through 19.1.119.2.0 – through 19.2.0 |
| Meta | react-server-dom-parcel | 19.0.0 – through 19.0.019.1.0 – through 19.1.119.2.0 – through 19.2.0 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://www.facebook.com/security/advisories/cve-2025-55182 x_refsource_CONFIRM
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components x_refsource_CONFIRM
- https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/ media-coverage
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182 government-resource
- http://www.openwall.com/lists/oss-security/2025/12/03/4
- https://news.ycombinator.com/item?id=46136026