Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

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

4863 vulnerabilities reference this CWE, most recent first.

GHSA-42MF-G9WR-GRVH

Vulnerability from github – Published: 2022-05-17 00:01 – Updated: 2022-05-25 00:00
VLAI
Details

Laravel 9.1.8, when processing attacker-controlled data for deserialization, allows Remote Code Execution via an unserialize pop chain in __destruct in Illuminate\Broadcasting\PendingBroadcast.php and dispatch($command) in Illuminate\Bus\QueueingDispatcher.php.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-30778"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-05-16T04:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Laravel 9.1.8, when processing attacker-controlled data for deserialization, allows Remote Code Execution via an unserialize pop chain in __destruct in Illuminate\\Broadcasting\\PendingBroadcast.php and dispatch($command) in Illuminate\\Bus\\QueueingDispatcher.php.",
  "id": "GHSA-42mf-g9wr-grvh",
  "modified": "2022-05-25T00:00:22Z",
  "published": "2022-05-17T00:01:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-30778"
    },
    {
      "type": "WEB",
      "url": "https://github.com/1nhann/vulns/issues/1"
    }
  ],
  "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-42VF-2JWW-9PQR

Vulnerability from github – Published: 2024-10-13 21:30 – Updated: 2024-10-13 21:30
VLAI
Details

A vulnerability, which was classified as critical, was found in HuangDou UTCMS V9. This affects an unknown part of the file app/modules/ut-template/admin/template_creat.php. The manipulation of the argument content leads to deserialization. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-9917"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-13T20:15:03Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability, which was classified as critical, was found in HuangDou UTCMS V9. This affects an unknown part of the file app/modules/ut-template/admin/template_creat.php. The manipulation of the argument content leads to deserialization. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-42vf-2jww-9pqr",
  "modified": "2024-10-13T21:30:45Z",
  "published": "2024-10-13T21:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-9917"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DeepMountains/zzz/blob/main/CVE5-2.md"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.280245"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.280245"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.418749"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-436V-JG82-P533

Vulnerability from github – Published: 2026-02-10 18:30 – Updated: 2026-02-12 19:19
VLAI
Summary
Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE
Details

Deserialization of untrusted data in the Azure AI Language Conversations Authoring client library for Python allows an unauthorized attacker to execute code over a network.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "azure-ai-language-conversations-authoring"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.0b4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-21531"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-12T18:28:29Z",
    "nvd_published_at": "2026-02-10T18:16:35Z",
    "severity": "CRITICAL"
  },
  "details": "Deserialization of untrusted data in the Azure AI Language Conversations Authoring client library for Python allows an unauthorized attacker to execute code over a network.",
  "id": "GHSA-436v-jg82-p533",
  "modified": "2026-02-12T19:19:53Z",
  "published": "2026-02-10T18:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21531"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Azure/azure-sdk-for-python"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531"
    }
  ],
  "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"
    }
  ],
  "summary": "Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE"
}

GHSA-438X-XP6G-PPJF

Vulnerability from github – Published: 2025-09-22 21:30 – Updated: 2026-04-01 18:36
VLAI
Details

Deserialization of Untrusted Data vulnerability in ConveyThis Language Translate Widget for WordPress – ConveyThis allows Object Injection. This issue affects Language Translate Widget for WordPress – ConveyThis: from n/a through 264.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-57919"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-22T19:15:48Z",
    "severity": "HIGH"
  },
  "details": "Deserialization of Untrusted Data vulnerability in ConveyThis Language Translate Widget for WordPress \u2013 ConveyThis allows Object Injection. This issue affects Language Translate Widget for WordPress \u2013 ConveyThis: from n/a through 264.",
  "id": "GHSA-438x-xp6g-ppjf",
  "modified": "2026-04-01T18:36:10Z",
  "published": "2025-09-22T21:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-57919"
    },
    {
      "type": "WEB",
      "url": "https://patchstack.com/database/wordpress/plugin/conveythis-translate/vulnerability/wordpress-language-translate-widget-for-wordpress-conveythis-plugin-264-php-object-injection-vulnerability?_s_id=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-439V-7MV7-5P44

Vulnerability from github – Published: 2026-03-12 21:34 – Updated: 2026-06-05 21:31
VLAI
Details

Inductive Automation Ignition Software is vulnerable to an unauthenticated API endpoint exposure that may allow an attacker to remotely change the "forgot password" recovery email address.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-13913"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-12T19:16:14Z",
    "severity": "MODERATE"
  },
  "details": "Inductive Automation Ignition Software\u00a0is vulnerable to an unauthenticated API endpoint exposure that may allow an attacker to remotely change the \"forgot password\" recovery email address.",
  "id": "GHSA-439v-7mv7-5p44",
  "modified": "2026-06-05T21:31:50Z",
  "published": "2026-03-12T21:34:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13913"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-071-06.json"
    },
    {
      "type": "WEB",
      "url": "https://inductiveautomation.com/resources/article/ignition-security-hardening-guide"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-071-06"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:H/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-43C4-9QGJ-X742

Vulnerability from github – Published: 2024-06-04 12:31 – Updated: 2024-06-21 14:34
VLAI
Summary
MLFlow unsafe deserialization
Details

Deserialization of untrusted data can occur in versions of the MLflow platform running version 1.1.0 or newer, enabling a maliciously uploaded scikit-learn model to run arbitrary code on an end user’s system when interacted with.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mlflow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.1.0"
            },
            {
              "last_affected": "2.14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-37053"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-05T13:17:49Z",
    "nvd_published_at": "2024-06-04T12:15:10Z",
    "severity": "HIGH"
  },
  "details": "Deserialization of untrusted data can occur in versions of the MLflow platform running version 1.1.0 or newer, enabling a maliciously uploaded scikit-learn model to run arbitrary code on an end user\u2019s system when interacted with.",
  "id": "GHSA-43c4-9qgj-x742",
  "modified": "2024-06-21T14:34:44Z",
  "published": "2024-06-04T12:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-37053"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mlflow/mlflow"
    },
    {
      "type": "WEB",
      "url": "https://hiddenlayer.com/sai-security-advisory/mlflow-june2024"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "MLFlow unsafe deserialization"
}

GHSA-43C9-25JG-RXM4

Vulnerability from github – Published: 2024-05-16 12:30 – Updated: 2024-05-16 12:30
VLAI
Details

The ConvertPlus plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.5.26 via deserialization of untrusted input from the 'settings_encoded' attribute of the 'smile_modal' shortcode. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-4838"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-16T11:15:49Z",
    "severity": "HIGH"
  },
  "details": "The ConvertPlus plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.5.26 via deserialization of untrusted input from the \u0027settings_encoded\u0027 attribute of the \u0027smile_modal\u0027 shortcode. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.",
  "id": "GHSA-43c9-25jg-rxm4",
  "modified": "2024-05-16T12:30:22Z",
  "published": "2024-05-16T12:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-4838"
    },
    {
      "type": "WEB",
      "url": "https://www.convertplug.com/plus"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/16f5a104-dce0-4249-91b9-67f99cce16d3?source=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-43GC-MJXG-GVRQ

Vulnerability from github – Published: 2021-03-22 23:29 – Updated: 2022-02-08 21:31
VLAI
Summary
XStream is vulnerable to an Arbitrary Code Execution attack
Details

Impact

The vulnerability may allow a remote attacker to execute arbitrary code only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.

Patches

If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

Workarounds

See workarounds for the different versions covering all CVEs.

References

See full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for CVE-2021-21350.

Credits

The vulnerability was discovered and reported by threedr3am.

For more information

If you have any questions or comments about this advisory: * Open an issue in XStream * Contact us at XStream Google Group

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "com.thoughtworks.xstream:xstream"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21350"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434",
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-03-22T23:26:55Z",
    "nvd_published_at": "2021-03-23T00:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe vulnerability may allow a remote attacker to execute arbitrary code only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream\u0027s security framework with a whitelist limited to the minimal required types.\n\n### Patches\nIf you rely on XStream\u0027s default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.16.\n\n### Workarounds\nSee [workarounds](https://x-stream.github.io/security.html#workaround) for the different versions covering all CVEs.\n\n### References\nSee full information about the nature of the vulnerability and the steps to reproduce it in XStream\u0027s documentation for [CVE-2021-21350](https://x-stream.github.io/CVE-2021-21350.html).\n\n### Credits\nThe vulnerability was discovered and reported by threedr3am.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [XStream](https://github.com/x-stream/xstream/issues)\n* Contact us at [XStream Google Group](https://groups.google.com/group/xstream-user)",
  "id": "GHSA-43gc-mjxg-gvrq",
  "modified": "2022-02-08T21:31:51Z",
  "published": "2021-03-22T23:29:28Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/x-stream/xstream/security/advisories/GHSA-43gc-mjxg-gvrq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21350"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/x-stream/xstream"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210430-0002"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2021/dsa-5004"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
    },
    {
      "type": "WEB",
      "url": "https://x-stream.github.io/CVE-2021-21350.html"
    },
    {
      "type": "WEB",
      "url": "https://x-stream.github.io/security.html#workaround"
    },
    {
      "type": "WEB",
      "url": "http://x-stream.github.io/changes.html#1.4.16"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "XStream is vulnerable to an Arbitrary Code Execution attack"
}

GHSA-43RR-VH89-FJ97

Vulnerability from github – Published: 2022-05-13 01:19 – Updated: 2022-05-13 01:19
VLAI
Details

An issue was discovered in EasyLogin Pro through 1.3.0. Encryptor.php contains an unserialize call that can be exploited for remote code execution in the decrypt function, if the attacker knows the key.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-15576"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-08-24T21:29:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in EasyLogin Pro through 1.3.0. Encryptor.php contains an unserialize call that can be exploited for remote code execution in the decrypt function, if the attacker knows the key.",
  "id": "GHSA-43rr-vh89-fj97",
  "modified": "2022-05-13T01:19:10Z",
  "published": "2022-05-13T01:19:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-15576"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/45227"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/149018/Easylogin-Pro-1.3.0-Remote-Code-Execution.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-43X2-G84Q-FMQX

Vulnerability from github – Published: 2026-06-22 21:10 – Updated: 2026-06-22 21:10
VLAI
Summary
OpenDJ Pre-Auth RCE via Java Deserialization in JMX RMI
Details

Summary

Description

A Deserialization of Untrusted Data (CWE-502) issue in OpenDJ's JMX RMI connector allows an unauthenticated remote attacker to deserialize arbitrary Java objects on the server. The vulnerability exists because the platform reads and processes attacker-controlled bytes prior to authentication. This affects OpenDJ Community Edition through 5.1.0. This has been patched in version 5.1.1.

Impact

This impacts all current OpenDJ releases where the JMX Connection Handler is enabled. While disabled by default, it is frequently enabled in practice for monitoring integrations. Exploitation requires TCP reachability to the configured listener and does not require authentication, prior privileges, or client certificates. Successful exploitation results in unauthenticated Remote Code Execution (RCE), with the severity depending on the runtime classpath and Java version. Unauthenticated RCE was demonstrated on the OpenDJ 4.4.15 (JDK 11 + Jackson 2.12.6.1).

Patch

This has been patched in OpenDJ Community Edition version 5.1.1. Users are encouraged to update to the latest release.

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.1.0"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.openidentityplatform.opendj:opendj-server-legacy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46495"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-22T21:10:31Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "## Summary\n\n**Description**\n\nA Deserialization of Untrusted Data (CWE-502) issue in OpenDJ\u0027s JMX RMI connector allows an unauthenticated remote attacker to deserialize arbitrary Java objects on the server. The vulnerability exists because the platform reads and processes attacker-controlled bytes prior to authentication. This affects OpenDJ Community Edition through 5.1.0. This has been patched in version 5.1.1.\n\n## Impact\nThis impacts all current OpenDJ releases where the JMX Connection Handler is enabled. While disabled by default, it is frequently enabled in practice for monitoring integrations. Exploitation requires TCP reachability to the configured listener and does not require authentication, prior privileges, or client certificates. Successful exploitation results in unauthenticated Remote Code Execution (RCE), with the severity depending on the runtime classpath and Java version. Unauthenticated RCE was demonstrated on the OpenDJ 4.4.15 (JDK 11 + Jackson 2.12.6.1).\n\n## Patch\nThis has been patched in OpenDJ Community Edition version 5.1.1. Users are encouraged to update to the latest release.",
  "id": "GHSA-43x2-g84q-fmqx",
  "modified": "2026-06-22T21:10:31Z",
  "published": "2026-06-22T21:10:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OpenIdentityPlatform/OpenDJ/security/advisories/GHSA-43x2-g84q-fmqx"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OpenIdentityPlatform/OpenDJ"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenDJ Pre-Auth RCE via Java Deserialization in JMX RMI"
}

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.