Elastic Security Detection Rules

React2Shell Network Security Alert

Last updated 2 months ago on 2025-12-10
Created 2 months ago on 2025-12-10

About

This rule identifies network security alerts related to CVE-2025-55182 exploitation attempts from different network security integrations. CVE-2025-55182 is a critical remote code execution vulnerability in React Server Components (RSC) Flight protocol. The vulnerability allows attackers to execute arbitrary code on the server by sending specially crafted deserialization payloads that exploit prototype chain traversal to access the Function constructor.
Tags
Domain: NetworkDomain: ApplicationDomain: WebUse Case: Threat DetectionUse Case: VulnerabilityTactic: Initial AccessTactic: ExecutionData Source: PAN-OSData Source: FortinetData Source: SuricataData Source: Cisco FTDLanguage: kuery
Severity
high
Risk Score
73
MITRE ATT&CK™

Initial Access (TA0001)(external, opens in a new tab or window)

↳ Exploit Public-Facing Application (T1190)(external, opens in a new tab or window)

Execution (TA0002)(external, opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(external, opens in a new tab or window)

License
Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-panw.panos*logs-cisco_ftd.*logs-fortinet_fortigate.*logs-suricata.*
Related Integrations

panw(external, opens in a new tab or window)

cisco_ftd(external, opens in a new tab or window)

fortinet_fortigate(external, opens in a new tab or window)

suricata(external, opens in a new tab or window)

Query
text code block:
(event.dataset:"cisco_ftd.log" and message:"SERVER-WEBAPP React Server Components remote code execution attempt") or
(event.dataset:"fortinet_fortigate.log" and message:"applications3: React.Server.Components.react-flight.Remote.Code.Execution") or
(event.dataset:"panw.panos" and event.action:"exploit_detected" and event.original :*React*Server*) or
(event.dataset:("suricata_corelight" or "suricata.eve") and rule.name:*CVE-2025-55182*)

Install detection rules in Elastic Security

Detect React2Shell Network Security Alert in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).