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How to Match & Replace a JSON Response Body for any specific value in Burpsuite

JSON Response Body:-

{
 "field1":value1,
 "field2":value2,
 "field3":value3,
 "field4":value4,
 "field5":value5
}

I need to replace specific value of field3 in above JSON response to some other value e.g. valueX

Tried Burpsuite > Proxy > Options > Match and Replace

Enabled: True

Item: Response Body

Match: ^"field3":value3$

Replace: "field3":valueX"

Type: Regex

Expected JSON

{ 
"field1":value1, 
"field2":value2, 
"field3":valueX, 
"field4":value4, 
"field5":value5
}

Thanks

Solution

  • Your regular expression doesn't exactly match the line field3 line. For example, you have a leading space on that line, so ^" will not match.

    I recommend you simplify the expression a little:

    Match: "field3":value3
Replace: "field3":valueX