This library allows strings to be parsed as functions and stored as a specialized component, JsonFunctionValue
. To do this, Javascripts eval
function is used to execute strings that begin with function as Javascript. This unfortunately could allow arbitrary code to be executed if it exists as a value within the JSON structure being displayed. Given that this component may often be used to display data from arbitrary, untrusted sources, this is extremely dangerous. One important note is that users who have defined a custom onSubmitValueParser
callback prop on the JsonTree
component should be unaffected. This vulnerability exists in the default onSubmitValueParser
prop which calls parse
. Prop is added to JsonTree
called allowFunctionEvaluation
. This prop will be set to true
in v2.2.2, which allows upgrade without losing backwards-compatibility. In v2.2.2, we switched from using eval
to using Function
to construct anonymous functions. This is better than eval
for the following reasons: - Arbitrary code should not be able to execute immediately, since the Function
constructor explicitly only creates anonymous functions - Functions are created without local closures, so they only have access to the global scope If you use: - Version <2.2.2
, you must upgrade as soon as possible. - Version ^2.2.2
, you must explicitly set JsonTree
s allowFunctionEvaluation
prop to false
to fully mitigate this vulnerability. - Version >=3.0.0
, allowFunctionEvaluation
is already set to false
by default, so no further steps are necessary.
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. “eval”).
Name | Vendor | Start Version | End Version |
---|---|---|---|
React_editable_json_tree | React_editable_json_tree_project | * | 2.2.2 (excluding) |