YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_EXPL_SUSP_JS_POC_RSC_Detector_Payloads_Dec25
Detects RCE indicators related to the proof-of-concept code for the React Server Remote Code Execution Vulnerability (CVE-2025-55182) as used in the RSC Detector browser extension but could be used in other JavaScript based PoC code as well
- Author
- Florian Roth
- Date
- 2025-12-06
- 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) as used in the RSC Detector browser extension but could be used in other JavaScript based PoC code as well
It defines 3 patterns (3 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule SIGNATURE_BASE_EXPL_SUSP_JS_POC_RSC_Detector_Payloads_Dec25 : CVE_2025_55182
{
meta:
= "Detects RCE indicators related to the proof-of-concept code for the React Server Remote Code Execution Vulnerability (CVE-2025-55182) as used in the RSC Detector browser extension but could be used in other JavaScript based PoC code as well"
= "Florian Roth"
= "98887e97-2dd4-5777-9fab-02805035de14"
= "2025-12-06"
= "2026-05-15"
= "https://github.com/mrknow001/RSC_Detector"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/react_pocs_indicators_dec25.yar#L106-L123"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "b51f4028662795ffcbf4c17c1b2cbad35a8fa64104aa5cfdaf24b13e9663eb09"
= 70
= 85
= "CVE-2025-55182"
strings:
$s1 = "process.mainModule.require('child_process').execSync("
$s2 = ").toString('base64');"
$f1 = "echo vulnerability_test"
condition:
all of ( $s* ) and not 1 of ( $f* )
}
Strings (3 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "process.mainModule.require('child_process').execSync(" | |
| $s2 | text | ").toString('base64');" | |
| $f1 | text | "echo vulnerability_test" |
Condition
all of ( $s* ) and not 1 of ( $f* )In plain words (Heuristic)
- All patterns in ( $s* ) must match.
- At least 1 patterns in ( $f* ) must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Licence & attribution
Author: Florian Roth
Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 98887e97-2dd4-5777-9fab-02805035de14
Tags:CVE_2025_55182
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