CVSS 9.8 · Critical EPSS 0,99%
Kerentanan Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') pada webreflection flatted. Skor CVSS 3.1 9.8 (Critical) menurut NVD.
flatted is a circular JSON parser. Prior to version 3.4.2, the parse() function in flatted can use attacker-controlled string values from the parsed JSON as direct array index keys, without validating that they are numeric. Since the internal input buffer is a JavaScript Array, accessing it with the key "__proto__" returns Array.prototype via the inherited getter. This object is then treated as a legitimate parsed value and assigned as a property of the output object, effectively leaking a live reference to Array.prototype to the consumer. Any code that subsequently writes to that property will pollute the global prototype. This issue has been patched in version 3.4.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| webreflection | flatted | Semua versi sebelum 3.4.2 |