Deserialization of Untrusted Data Affecting cryptidy package, versions [0,]
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- published31 Oct 2025
- disclosed31 Oct 2025
- creditJavier Morales
Introduced: 31 Oct 2025
NewCVE-2025-63675 (opens in a new tab)How to fix?
There is no fixed version for cryptidy.
Overview
cryptidy is a Python high level library for symmetric & asymmetric encryption
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the aes_decrypt_message function. An attacker can execute arbitrary code by supplying crafted data that is deserialized using pickle.loads.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.