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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_EXPL_RCE_React_Server_CVE_2025_55182_POC_Dec25

Detects RCE indicators related to the proof-of-concept code for the React Server Remote Code Execution Vulnerability (CVE-2025-55182)

ExploitSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Florian Roth
Date
2025-12-05
Modified
2026-05-15
Score / Quality
70 / 85

What this rule detects

Detects RCE indicators related to the proof-of-concept code for the React Server Remote Code Execution Vulnerability (CVE-2025-55182)

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
expl-rce-react-server-cve-2025-55182-poc-dec25.yarDetection Rule License 1.1
rule SIGNATURE_BASE_EXPL_RCE_React_Server_CVE_2025_55182_POC_Dec25 : CVE_2025_55182 FILE
{
	meta:
		description = "Detects RCE indicators related to the proof-of-concept code for the React Server Remote Code Execution Vulnerability (CVE-2025-55182)"
		author = "Florian Roth"
		id = "fdd661a9-0532-5246-b744-0c1a9632d1cd"
		date = "2025-12-05"
		modified = "2026-05-15"
		reference = "https://www.youtube.com/watch?v=MmdwakT-Ve8"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/react_pocs_indicators_dec25.yar#L41-L56"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "54854f6cf3d1f4f30fb6de8312a5969bd5bc0d8c7a047a9f0ef195551c1dc2c6"
		score = 70
		quality = 85
		tags = "CVE-2025-55182, FILE"

	strings:
		$s1 = "process.mainModule.require('child_process').execSync("
		$s2 = "$1:constructor:constructor"

	condition:
		all of them and not uint16( 0 ) == 0x3c3f
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$s1text"process.mainModule.require('child_process').execSync("
$s2text"$1:constructor:constructor"

Condition

all of them and not uint16( 0 ) == 0x3c3f

In plain words (Heuristic)

  • All patterns in the rule must match.

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References

Licence & attribution

Author: Florian Roth

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: fdd661a9-0532-5246-b744-0c1a9632d1cd

Tags:CVE_2025_55182FILE

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