Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

4798 vulnerabilities reference this CWE, most recent first.

CVE-2017-20207 (GCVE-0-2017-20207)

Vulnerability from cvelistv5 – Published: 2025-10-18 03:33 – Updated: 2026-04-08 17:17
VLAI
Title
Flickr Gallery <= 1.5.2 - Unauthenticated PHP Object Injection
Summary
The Flickr Gallery plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.5.2 via deserialization of untrusted input from the `pager ` parameter. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Dan Coulter Flickr Gallery Affected: 0 , < 1.5.3 (semver)
Create a notification for this product.
Credits
Matt Barry
Show details on NVD website
To clipboard 

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CVE-2017-20206 (GCVE-0-2017-20206)

Vulnerability from cvelistv5 – Published: 2025-10-18 03:33 – Updated: 2026-04-08 17:03
VLAI
Title
Appointments <= 2.2.1 - Unauthenticated PHP Object Injection
Summary
The Appointments plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.2.1 via deserialization of untrusted input from the `wpmudev_appointments` cookie. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
wpmudev Appointments Affected: 0 , < 2.2.2 (semver)
Create a notification for this product.
Credits
Matt Barry
Show details on NVD website
To clipboard 

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CVE-2017-17406 (GCVE-0-2017-17406)

Vulnerability from cvelistv5 – Published: 2018-01-23 01:00 – Updated: 2024-08-05 20:51
VLAI
Summary
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Netgain Enterprise Manager. Authentication is not required to exploit this vulnerability. The specific flaw exists within an exposed RMI registry, which listens on TCP ports 1800 and 1850 by default. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process. Was ZDI-CAN-4753.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
zdi
References
Impacted products
Date Public
2017-12-13 00:00
Show details on NVD website
To clipboard 

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CVE-2017-15089 (GCVE-0-2017-15089)

Vulnerability from cvelistv5 – Published: 2018-02-15 17:00 – Updated: 2024-09-16 19:05
VLAI
Summary
It was found that the Hotrod client in Infinispan before 9.2.0.CR1 would unsafely read deserialized data on information from the cache. An authenticated attacker could inject a malicious object into the data cache and attain deserialization on the client, and possibly conduct further attacks.
Severity
No CVSS data available.
CWE
Assigner
References
URL Tags
http://www.securitytracker.com/id/1040360 vdb-entryx_refsource_SECTRACK
https://access.redhat.com/errata/RHSA-2018:0479 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:0481 vendor-advisoryx_refsource_REDHAT
https://github.com/infinispan/infinispan/pull/5639 x_refsource_CONFIRM
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https://access.redhat.com/errata/RHSA-2018:0478 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1326 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Infinispan infinispan Affected: before 9.2.0.CR1
Create a notification for this product.
Date Public
2018-02-12 00:00
Show details on NVD website
To clipboard 

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CVE-2017-12149 (GCVE-0-2017-12149)

Vulnerability from cvelistv5 – Published: 2017-10-04 20:00 – Updated: 2025-10-21 23:55
VLAI
Summary
In Jboss Application Server as shipped with Red Hat Enterprise Application Platform 5.2, it was found that the doFilter method in the ReadOnlyAccessFilter of the HTTP Invoker does not restrict classes for which it performs deserialization and thus allowing an attacker to execute arbitrary code via crafted serialized data.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Date Public
2017-08-29 00:00
Show details on NVD website
To clipboard 

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CVE-2017-11153 (GCVE-0-2017-11153)

Vulnerability from cvelistv5 – Published: 2017-08-08 15:00 – Updated: 2024-09-16 17:47
VLAI
Summary
Deserialization vulnerability in synophoto_csPhotoMisc.php in Synology Photo Station before 6.7.3-3432 and 6.3-2967 allows remote attackers to gain administrator privileges via a crafted serialized payload.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data (CWE-502)
Assigner
References
Impacted products
Vendor Product Version
Synology Synology Photo Station Affected: before 6.7.3-3432 and 6.3-2967
Create a notification for this product.
Date Public
2017-07-31 00:00
Show details on NVD website
To clipboard 

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CVE-2017-7504 (GCVE-0-2017-7504)

Vulnerability from cvelistv5 – Published: 2017-05-19 20:00 – Updated: 2024-08-05 16:04
VLAI
Summary
HTTPServerILServlet.java in JMS over HTTP Invocation Layer of the JbossMQ implementation, which is enabled by default in Red Hat Jboss Application Server <= Jboss 4.X does not restrict the classes for which it performs deserialization, which allows remote attackers to execute arbitrary code via crafted serialized data.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Date Public
2017-05-18 00:00
Show details on NVD website
To clipboard 

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CVE-2017-3207 (GCVE-0-2017-3207)

Vulnerability from cvelistv5 – Published: 2018-06-11 17:00 – Updated: 2024-08-05 14:16
VLAI
Title
WebORB for Java by Midnight Coders, version 5.1.1.0, Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization
Summary
The Java implementations of AMF3 deserializers in WebORB for Java by Midnight Coders, version 5.1.1.0, derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2017-04-04 00:00
Show details on NVD website
To clipboard 

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CVE-2017-3203 (GCVE-0-2017-3203)

Vulnerability from cvelistv5 – Published: 2018-06-11 17:00 – Updated: 2024-08-05 14:16
VLAI
Title
Pivotal/Spring Spring-flex's Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization
Summary
The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2017-04-04 00:00
Show details on NVD website
To clipboard 

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CVE-2017-3201 (GCVE-0-2017-3201)

Vulnerability from cvelistv5 – Published: 2018-06-11 17:00 – Updated: 2024-08-05 14:16
VLAI
Title
Flamingo amf-serializer by Exadel, version 2.2.0, Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization
Summary
The Java implementation of AMF3 deserializers used in Flamingo amf-serializer by Exadel, version 2.2.0 derives class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2017-04-04 00:00
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design Implementation

If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.

Mitigation
Implementation

When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.

Mitigation
Implementation

Explicitly define a final object() to prevent deserialization.

Mitigation
Architecture and Design Implementation
  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation

Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.

Mitigation
Architecture and Design Implementation

Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.

Mitigation MIT-29
Operation

Strategy: Firewall

Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].

CAPEC-586: Object Injection

An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.

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