CVE-2025-25304

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.

Summary

The vlSelectionTuples function can be used to call JavaScript functions, leading to XSS.

Details

vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument.

Example call: vlSelectionTuples([{datum:<argument>}], {fields:[{getter:<function>}]})

This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf.

PoC

{"$schema":"https://vega.github.io/schema/vega/v5.json","signals":[{"name":"a","init":"+{valueOf:vlSelectionTuples([{datum:'alert(1)'}],{fields:[{getter:[].at.constructor}]})[0].values[0]}"}]}

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.

Summary

The vlSelectionTuples function can be used to call JavaScript functions, leading to XSS.

Details

vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument.

Example call: vlSelectionTuples([{datum:<argument>}], {fields:[{getter:<function>}]})

This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf.

PoC

{"$schema":"https://vega.github.io/schema/vega/v5.json","signals":[{"name":"a","init":"+{valueOf:vlSelectionTuples([{datum:'alert(1)'}],{fields:[{getter:[].at.constructor}]})[0].values[0]}"}]}

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Prior to version 5.26.0 of vega and 5.4.2 of vega-selections, the vlSelectionTuples function can be used to call JavaScript functions, leading to cross-site scripting.vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument. This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf. Version 5.26.0 of vega and 5.4.2 of vega-selections fix this issue.