Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5189 vulnerabilities reference this CWE, most recent first.
CVE-2026-39551 (GCVE-0-2026-39551)
Vulnerability from cvelistv5 – Published: 2026-06-02 10:46 – Updated: 2026-06-02 12:10
VLAI
EPSS
VEX
Title
WordPress Töbel theme <= 1.8.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Elated-Themes Töbel allows Object Injection.
This issue affects Töbel: from n/a through 1.8.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 12:04 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/t… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elated-Themes | Töbel |
Affected:
n/a , ≤ 1.8.1
(custom)
|
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CVE-2026-39550 (GCVE-0-2026-39550)
Vulnerability from cvelistv5 – Published: 2026-06-02 10:44 – Updated: 2026-06-02 12:10
VLAI
EPSS
VEX
Title
WordPress Aperitif theme <= 1.6 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Elated-Themes Aperitif allows Object Injection.
This issue affects Aperitif: from n/a through 1.6.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 12:04 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/a… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elated-Themes | Aperitif |
Affected:
n/a , ≤ 1.6
(custom)
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CVE-2026-39545 (GCVE-0-2026-39545)
Vulnerability from cvelistv5 – Published: 2026-06-17 09:50 – Updated: 2026-06-17 15:31
VLAI
EPSS
VEX
Title
WordPress Zermatt theme <= 1.6.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Zermatt <= 1.6.1 versions.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 13:36 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/z… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Select-Themes | Zermatt |
Affected:
n/a , ≤ 1.6.1
(custom)
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CVE-2026-39539 (GCVE-0-2026-39539)
Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:41
VLAI
EPSS
VEX
Title
WordPress Alloggio - Hotel Booking theme <= 2.1.2 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Alloggio - Hotel Booking <= 2.1.2 versions.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 10:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/a… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Edge-Themes | Alloggio - Hotel Booking |
Affected:
n/a , ≤ 2.1.2
(custom)
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CVE-2026-39532 (GCVE-0-2026-39532)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:18 – Updated: 2026-06-16 17:11
VLAI
EPSS
VEX
Title
WordPress Events Calendar for GeoDirectory plugin <= 2.3.25 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Events Calendar for GeoDirectory <= 2.3.25 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 13:56 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Stiofan | Events Calendar for GeoDirectory |
Affected:
n/a , ≤ 2.3.25
(custom)
|
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CVE-2026-39529 (GCVE-0-2026-39529)
Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:42
VLAI
EPSS
VEX
Title
WordPress Elementra theme <= 1.0.9 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Elementra <= 1.0.9 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 10:27 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/e… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ThemeREX Group | Elementra |
Affected:
n/a , ≤ 1.0.9
(custom)
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CVE-2026-39499 (GCVE-0-2026-39499)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:17 – Updated: 2026-06-16 15:49
VLAI
EPSS
VEX
Title
WordPress Advanced Product Fields (Product Addons) for WooCommerce plugin <= 1.6.19 - PHP Object Injection vulnerability
Summary
Shop manager PHP Object Injection in Advanced Product Fields (Product Addons) for WooCommerce <= 1.6.19 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 15:48 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wombat Plugins | Advanced Product Fields (Product Addons) for WooCommerce |
Affected:
n/a , ≤ 1.6.19
(custom)
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CVE-2026-39498 (GCVE-0-2026-39498)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:17 – Updated: 2026-06-16 14:21
VLAI
EPSS
VEX
Title
WordPress YayMail plugin <= 4.3.3 - PHP Object Injection vulnerability
Summary
Shop manager PHP Object Injection in YayMail <= 4.3.3 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 14:21 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
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CVE-2026-39481 (GCVE-0-2026-39481)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:17 – Updated: 2026-06-16 18:05
VLAI
EPSS
VEX
Title
WordPress Modula Image Gallery plugin <= 2.14.18 - PHP Object Injection vulnerability
Summary
Author PHP Object Injection in Modula Image Gallery <= 2.14.18 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 18:04 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WP Chill | Modula Image Gallery |
Affected:
n/a , ≤ 2.14.18
(custom)
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CVE-2026-39478 (GCVE-0-2026-39478)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:17 – Updated: 2026-06-16 12:36
VLAI
EPSS
VEX
Title
WordPress Anti-Malware Security and Brute-Force Firewall plugin <= 4.23.87 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Anti-Malware Security and Brute-Force Firewall <= 4.23.87 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 12:36 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eli Scheetz | Anti-Malware Security and Brute-Force Firewall |
Affected:
n/a , ≤ 4.23.87
(custom)
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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.