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.
4834 vulnerabilities reference this CWE, most recent first.
GHSA-HJR4-FHGP-23G9
Vulnerability from github – Published: 2022-05-24 17:42 – Updated: 2024-10-14 16:09
VLAI
Summary
qlib Deserialization of Untrusted Data vulnerability
Details
This affects all versions of package qlib. The workflow function in cli part of qlib was using an unsafe YAML load function.
Severity
6.6 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyqlib"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.7.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-23338"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2024-04-29T11:02:15Z",
"nvd_published_at": "2021-02-15T16:15:00Z",
"severity": "MODERATE"
},
"details": "This affects all versions of package qlib. The workflow function in cli part of qlib was using an unsafe YAML load function.",
"id": "GHSA-hjr4-fhgp-23g9",
"modified": "2024-10-14T16:09:46Z",
"published": "2022-05-24T17:42:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23338"
},
{
"type": "WEB",
"url": "https://github.com/418sec/huntr/pull/1329"
},
{
"type": "PACKAGE",
"url": "https://github.com/microsoft/qlib"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyqlib/PYSEC-2021-86.yaml"
},
{
"type": "WEB",
"url": "https://security.snyk.io/vuln/SNYK-PYTHON-PYQLIB-1085990"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/SNYK-PYTHON-QLIB-1054635"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "qlib Deserialization of Untrusted Data vulnerability"
}
GHSA-HJXR-GV9H-RJXC
Vulnerability from github – Published: 2023-02-14 21:30 – Updated: 2026-04-13 18:30
VLAI
Details
Microsoft Exchange Server Remote Code Execution Vulnerability
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2023-21529"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-02-14T20:15:00Z",
"severity": "HIGH"
},
"details": "Microsoft Exchange Server Remote Code Execution Vulnerability",
"id": "GHSA-hjxr-gv9h-rjxc",
"modified": "2026-04-13T18:30:34Z",
"published": "2023-02-14T21:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-21529"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529"
},
{
"type": "WEB",
"url": "https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HM34-CC7R-4P3X
Vulnerability from github – Published: 2022-04-06 00:01 – Updated: 2022-04-14 00:00
VLAI
Details
The HTTP client in MashZone NextGen through 10.7 GA deserializes untrusted data when it gets an HTTP response with a 570 status code.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2021-33207"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-04-05T03:15:00Z",
"severity": "CRITICAL"
},
"details": "The HTTP client in MashZone NextGen through 10.7 GA deserializes untrusted data when it gets an HTTP response with a 570 status code.",
"id": "GHSA-hm34-cc7r-4p3x",
"modified": "2022-04-14T00:00:37Z",
"published": "2022-04-06T00:01:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33207"
},
{
"type": "WEB",
"url": "https://github.com/blackarrowsec/advisories/tree/master/2021/CVE-2021-33207"
},
{
"type": "WEB",
"url": "https://www.softwareag.com/corporate/products/az/mashzone_nextgen/default"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HM97-5498-HWC7
Vulnerability from github – Published: 2026-07-13 12:35 – Updated: 2026-07-13 12:35
VLAI
Details
Deserialization of Untrusted Data vulnerability in Themeum Kirki kirki allows Object Injection.This issue affects Kirki: from n/a through <= 6.0.12.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2026-57724"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-13T10:16:39Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data vulnerability in Themeum Kirki kirki allows Object Injection.This issue affects Kirki: from n/a through \u003c= 6.0.12.",
"id": "GHSA-hm97-5498-hwc7",
"modified": "2026-07-13T12:35:04Z",
"published": "2026-07-13T12:35:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57724"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/kirki/vulnerability/wordpress-kirki-plugin-6-0-12-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HMH7-P3J6-5G37
Vulnerability from github – Published: 2022-05-24 17:40 – Updated: 2022-05-24 17:40
VLAI
Details
IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system, caused by an unsafe deserialization of trusted data. An attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 186509.
{
"affected": [],
"aliases": [
"CVE-2020-4682"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-28T13:15:00Z",
"severity": "CRITICAL"
},
"details": "IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system, caused by an unsafe deserialization of trusted data. An attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 186509.",
"id": "GHSA-hmh7-p3j6-5g37",
"modified": "2022-05-24T17:40:30Z",
"published": "2022-05-24T17:40:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-4682"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/186509"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/6408626"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-HMXM-J74J-WR83
Vulnerability from github – Published: 2026-06-15 21:30 – Updated: 2026-06-15 21:30
VLAI
Details
Unauthenticated PHP Object Injection in WP Travel Engine <= 6.7.12 versions.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2026-49770"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-15T21:17:22Z",
"severity": "CRITICAL"
},
"details": "Unauthenticated PHP Object Injection in WP Travel Engine \u003c= 6.7.12 versions.",
"id": "GHSA-hmxm-j74j-wr83",
"modified": "2026-06-15T21:30:50Z",
"published": "2026-06-15T21:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49770"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/wp-travel-engine/vulnerability/wordpress-wp-travel-engine-plugin-6-7-12-php-object-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP28-JQCH-QHRC
Vulnerability from github – Published: 2025-10-31 12:30 – Updated: 2026-01-20 15:31
VLAI
Details
Deserialization of Untrusted Data vulnerability in Chouby Polylang polylang allows Object Injection.This issue affects Polylang: from n/a through <= 3.7.3.
Severity
8.8 (High)
{
"affected": [],
"aliases": [
"CVE-2025-64353"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-31T12:15:35Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in Chouby Polylang polylang allows Object Injection.This issue affects Polylang: from n/a through \u003c= 3.7.3.",
"id": "GHSA-hp28-jqch-qhrc",
"modified": "2026-01-20T15:31:42Z",
"published": "2025-10-31T12:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64353"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/polylang/vulnerability/wordpress-polylang-plugin-3-7-3-deserialization-of-untrusted-data-vulnerability?_s_id=cve"
},
{
"type": "WEB",
"url": "https://vdp.patchstack.com/database/Wordpress/Plugin/polylang/vulnerability/wordpress-polylang-plugin-3-7-3-deserialization-of-untrusted-data-vulnerability"
},
{
"type": "WEB",
"url": "https://vdp.patchstack.com/database/Wordpress/Plugin/polylang/vulnerability/wordpress-polylang-plugin-3-7-3-deserialization-of-untrusted-data-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP6X-RRX2-386M
Vulnerability from github – Published: 2023-02-21 09:30 – Updated: 2023-02-28 03:30
VLAI
Details
The ShopLentor WordPress plugin before 2.5.4 unserializes user input from cookies in order to track viewed products and user data, which could lead to PHP Object Injection.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2023-0232"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-02-21T09:15:00Z",
"severity": "CRITICAL"
},
"details": "The ShopLentor WordPress plugin before 2.5.4 unserializes user input from cookies in order to track viewed products and user data, which could lead to PHP Object Injection.",
"id": "GHSA-hp6x-rrx2-386m",
"modified": "2023-02-28T03:30:18Z",
"published": "2023-02-21T09:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0232"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset/2852711/woolentor-addons/trunk/includes/helper-function.php"
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/1885a708-0e8a-4f4c-8e26-069bebe9a518"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP7H-F9PW-X5WJ
Vulnerability from github – Published: 2022-05-24 17:45 – Updated: 2024-04-04 03:05
VLAI
Details
Apache OFBiz has unsafe deserialization prior to 17.12.06. An unauthenticated attacker can use this vulnerability to successfully take over Apache OFBiz.
Severity
9.8 (Critical)
{
"affected": [],
"aliases": [
"CVE-2021-26295"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-22T12:15:00Z",
"severity": "CRITICAL"
},
"details": "Apache OFBiz has unsafe deserialization prior to 17.12.06. An unauthenticated attacker can use this vulnerability to successfully take over Apache OFBiz.",
"id": "GHSA-hp7h-f9pw-x5wj",
"modified": "2024-04-04T03:05:12Z",
"published": "2022-05-24T17:45:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26295"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/reccf8c8a58337ce7c035495d3d82fbc549e97036a9789a2a7d9cccf6@%3Cdev.ofbiz.apache.org%3E"
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{
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"url": "http://packetstormsecurity.com/files/162104/Apache-OFBiz-SOAP-Java-Deserialization.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-HP87-P4GW-J4GQ
Vulnerability from github – Published: 2022-05-20 00:00 – Updated: 2025-08-27 22:58
VLAI
Summary
gopkg.in/yaml.v3 Denial of Service
Details
An issue in the Unmarshal function in Go-Yaml v3 can cause a program to panic when attempting to deserialize invalid input.
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "gopkg.in/yaml.v3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-28948"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2022-05-25T20:17:24Z",
"nvd_published_at": "2022-05-19T20:15:00Z",
"severity": "HIGH"
},
"details": "An issue in the Unmarshal function in Go-Yaml v3 can cause a program to panic when attempting to deserialize invalid input.",
"id": "GHSA-hp87-p4gw-j4gq",
"modified": "2025-08-27T22:58:53Z",
"published": "2022-05-20T00:00:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-28948"
},
{
"type": "WEB",
"url": "https://github.com/go-yaml/yaml/issues/665"
},
{
"type": "WEB",
"url": "https://github.com/go-yaml/yaml/issues/666"
},
{
"type": "WEB",
"url": "https://github.com/go-yaml/yaml/commit/8f96da9f5d5eff988554c1aae1784627c4bf6754"
},
{
"type": "WEB",
"url": "https://github.com/go-yaml/yaml/commit/f6f7691b1fdeb513f56608cd2c32c51f8194bf51"
},
{
"type": "PACKAGE",
"url": "https://github.com/go-yaml/yaml"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20220923-0006"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "gopkg.in/yaml.v3 Denial of Service"
}
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.