2025-041: Critical Security Vulnerability in React Server Components

2025-041: Critical Security Vulnerability in React Server Components ↗ source

December 4, 2025 CERT-EU Advisory

Source: https://cert.europa.eu/publications/security-advisories/2025-041/

Summary

The vulnerability allows for unauthenticated remote code execution (RCE) via maliciously crafted HTTP requests [1]. It is recommended to update all affected component packages and any frameworks that integrate them. The vulnerability CVE-2025-55182, with a CVSS score of 10, is due to unsafe deserialisation of payloads from HTTP requests to React Server Function endpoints. It allows for unauthenticated remote code execution (RCE) via maliciously crafted HTTP requests [1]. React Server Functions allow a client to call a function on a server.

News Coverage

Date	Source	Article
2026-06-24	Kaspersky Securelist	StrikeShark: investigating a new campaign delivering Cobalt Strike through SharkLoader CVE-2025-55182
2026-05-26	Check Point Research	AI Threat Landscape Digest March-April 2026 CVE-2025-55182

Articles from the monitored vendor research blogs and security news feeds that reference a CVE cited in this publication, or name the campaign it covers. Coverage begins when feed monitoring started; earlier articles are not indexed.

CVEs Referenced in This Publication

CVE	CVSS	Affected
CVE-2025-55182	10.0 Critical	Meta React Server Components Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a fl…

Extracted from the publication text. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Meta 1 KEV

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.