Vulnerability-Lookup

GHSA-JR9C-873V-948H

Vulnerability from github – Published: 2026-08-22 09:30 – Updated: 2026-08-22 09:30

Details

The Mailgun for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) via path traversal in versions up to and including 2.2.0. This is due to insufficient input validation in the add_list() function, which accepts user-controlled array keys from $_POST['addresses'], passes them through sanitize_text_field(). This makes it possible for unauthenticated attackers to make authenticated POST requests to any Mailgun API endpoint using the WordPress site's API key, including creating inbound email-forwarding routes that can intercept password reset emails, leading to administrator account takeover.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78003"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T09:16:53Z",
    "severity": "CRITICAL"
  },
  "details": "The Mailgun for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) via path traversal in versions up to and including 2.2.0. This is due to insufficient input validation in the add_list() function, which accepts user-controlled array keys from $_POST[\u0027addresses\u0027], passes them through sanitize_text_field(). This makes it possible for unauthenticated attackers to make authenticated POST requests to any Mailgun API endpoint using the WordPress site\u0027s API key, including creating inbound email-forwarding routes that can intercept password reset emails, leading to administrator account takeover.",
  "id": "GHSA-jr9c-873v-948h",
  "modified": "2026-08-22T09:30:25Z",
  "published": "2026-08-22T09:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78003"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L259"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L323"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L331"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L557"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L259"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L323"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L331"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L557"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/110e888d-69fc-4682-b908-2b62288c5227?source=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"
    }
  ]
}

CVE-2026-78003 (GCVE-0-2026-78003)

Vulnerability from cvelistv5 – Published: 2026-08-22 08:26 – Updated: 2026-08-25 13:15

Title

Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array Keys

Summary

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 13:14 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

Wordfence mitre root

References

9 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…
https://plugins.trac.wordpress.org/browser/mailgu…

Impacted products

1 product

Vendor	Product	Version
mailgun	Mailgun for WordPress	Affected: 0 , ≤ 2.2.0 (semver)

Credits

Osvaldo Noe Gonzalez Del Rio (Os)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-78003",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T13:14:07.382843Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T13:15:26.345Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Mailgun for WordPress",
          "vendor": "mailgun",
          "versions": [
            {
              "lessThanOrEqual": "2.2.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Osvaldo Noe Gonzalez Del Rio (Os)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Mailgun for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) via path traversal in versions up to and including 2.2.0. This is due to insufficient input validation in the add_list() function, which accepts user-controlled array keys from $_POST[\u0027addresses\u0027], passes them through sanitize_text_field(). This makes it possible for unauthenticated attackers to make authenticated POST requests to any Mailgun API endpoint using the WordPress site\u0027s API key, including creating inbound email-forwarding routes that can intercept password reset emails, leading to administrator account takeover."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T08:26:38.970Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/110e888d-69fc-4682-b908-2b62288c5227?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L557"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L259"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L259"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L323"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L323"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/trunk/mailgun.php#L331"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L331"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mailgun/tags/2.1.10/mailgun.php#L557"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-21T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Mailgun for WordPress \u003c= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via \u0027addresses\u0027 Array Keys"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-78003",
    "datePublished": "2026-08-22T08:26:38.970Z",
    "dateReserved": "2026-08-21T19:58:10.111Z",
    "dateUpdated": "2026-08-25T13:15:26.345Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.