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.
4819 vulnerabilities reference this CWE, most recent first.
CVE-2025-40553 (GCVE-0-2025-40553)
Vulnerability from cvelistv5 – Published: 2026-01-28 07:35 – Updated: 2026-02-27 04:55
VLAI
EPSS
VEX
Title
SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability
Summary
SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SolarWinds | Web Help Desk |
Affected:
12.8.8 HF1 and below
|
Date Public
2026-01-28 07:35
Credits
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CVE-2025-40551 (GCVE-0-2025-40551)
Vulnerability from cvelistv5 – Published: 2026-01-28 07:33 – Updated: 2026-02-26 15:04
VLAI
EPSS
VEX
Title
SolarWinds Web Help Desk Deserialization of Untrusted Data Remote Code Execution Vulnerability
Summary
SolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.solarwinds.com/trust-center/security-… | vendor-advisorypatch |
| https://documentation.solarwinds.com/en/success_c… | release-notes |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SolarWinds | Web Help Desk |
Affected:
12.8.8 HF1 and below
|
Date Public
2026-01-28 07:32
Credits
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CVE-2025-39588 (GCVE-0-2025-39588)
Vulnerability from cvelistv5 – Published: 2025-04-17 15:46 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress Ultimate Store Kit Elementor Addons plugin <= 2.4.0 - Deserialization of untrusted data Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in bdthemes Ultimate Store Kit Elementor Addons ultimate-store-kit allows Object Injection.This issue affects Ultimate Store Kit Elementor Addons: from n/a through <= 2.4.0.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| bdthemes | Ultimate Store Kit Elementor Addons |
Affected:
0 , ≤ 2.4.0
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39565 (GCVE-0-2025-39565)
Vulnerability from cvelistv5 – Published: 2025-04-16 12:44 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress MelaPress Login Security plugin <= 2.1.0 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Melapress MelaPress Login Security melapress-login-security allows Object Injection.This issue affects MelaPress Login Security: from n/a through <= 2.1.0.
Severity
6.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| Melapress | MelaPress Login Security |
Affected:
0 , ≤ 2.1.0
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39551 (GCVE-0-2025-39551)
Vulnerability from cvelistv5 – Published: 2025-04-17 15:46 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress FluentBoards plugin <= 1.47 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Mahmudul Hasan Arif FluentBoards fluent-boards allows Object Injection.This issue affects FluentBoards: from n/a through <= 1.47.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| Mahmudul Hasan Arif | FluentBoards |
Affected:
0 , ≤ 1.47
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39550 (GCVE-0-2025-39550)
Vulnerability from cvelistv5 – Published: 2025-04-17 15:46 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress FluentCommunity plugin <= 1.2.15 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Shahjahan Jewel FluentCommunity fluent-community allows Object Injection.This issue affects FluentCommunity: from n/a through <= 1.2.15.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| Shahjahan Jewel | FluentCommunity |
Affected:
0 , ≤ 1.2.15
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39527 (GCVE-0-2025-39527)
Vulnerability from cvelistv5 – Published: 2025-04-17 15:46 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress Rating by BestWebSoft plugin <= 1.7 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in bestweblayout Rating by BestWebSoft rating-bws allows Object Injection.This issue affects Rating by BestWebSoft: from n/a through <= 1.7.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| bestweblayout | Rating by BestWebSoft |
Affected:
0 , ≤ 1.7
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39503 (GCVE-0-2025-39503)
Vulnerability from cvelistv5 – Published: 2025-05-23 12:43 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress Goodlayers Hotel plugin <= 3.1.4 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in GoodLayers Goodlayers Hotel gdlr-hotel allows Object Injection.This issue affects Goodlayers Hotel: from n/a through <= 3.1.4.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| GoodLayers | Goodlayers Hotel |
Affected:
0 , ≤ 3.1.4
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39500 (GCVE-0-2025-39500)
Vulnerability from cvelistv5 – Published: 2025-05-23 12:43 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress Goodlayers Hostel Plugin <= 3.1.2 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in GoodLayers Goodlayers Hostel gdlr-hostel allows Object Injection.This issue affects Goodlayers Hostel: from n/a through <= 3.1.2.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
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 | |
|---|---|---|---|
| GoodLayers | Goodlayers Hostel |
Affected:
0 , ≤ 3.1.2
(custom)
|
Date Public
2026-04-01 16:39
Credits
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CVE-2025-39499 (GCVE-0-2025-39499)
Vulnerability from cvelistv5 – Published: 2025-05-23 12:43 – Updated: 2026-04-28 16:12
VLAI
EPSS
VEX
Title
WordPress Medicare Theme <= 2.1.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in BoldThemes Medicare medicare allows Object Injection.This issue affects Medicare: from n/a through <= 2.1.0.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/m… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BoldThemes | Medicare |
Affected:
0 , ≤ 2.1.0
(custom)
|
Date Public
2026-04-01 16:39
Credits
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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.