Vulnerability-Lookup

GHSA-439G-QG26-VJWW

Vulnerability from github – Published: 2026-09-22 09:31 – Updated: 2026-09-22 09:31

Details

The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author's forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author's email address.

Severity

4.3 (Medium)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-91092"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-22T08:16:41Z",
    "severity": "MODERATE"
  },
  "details": "The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author\u0027s forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author\u0027s email address.",
  "id": "GHSA-439g-qg26-vjww",
  "modified": "2026-09-22T09:31:13Z",
  "published": "2026-09-22T09:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91092"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Actions.php#L806"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Members.php#L3704"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Posts.php#L319"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/functions.php#L2820"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/hooks.php#L1004"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3702319%40wpforo\u0026new=3702319%40wpforo"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/97084759-a8fb-4b26-a6fa-93d005b1110e?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-91092 (GCVE-0-2026-91092)

Vulnerability from cvelistv5 – Published: 2026-09-22 07:41 – Updated: 2026-09-23 18:46

Title

wpForo Forum <= 3.1.5 - Missing Authorization to Authenticated (Subscriber+) Guest Post Takeover via wpforo_post_edit Action / Forged comment_author_email Cookie

Summary

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 18:37 UTC

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence mitre root

References

7 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/wpforo…
https://plugins.trac.wordpress.org/browser/wpforo…
https://plugins.trac.wordpress.org/browser/wpforo…
https://plugins.trac.wordpress.org/browser/wpforo…
https://plugins.trac.wordpress.org/browser/wpforo…
https://plugins.trac.wordpress.org/changeset?repo…

Impacted products

1 product

Vendor	Product	Version
tomdever	wpForo Forum	Affected: 0 , ≤ 3.1.5 (semver)

Credits

Jonah Burgess (CryptoCat)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-91092",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T18:37:44.048003Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-23T18:46:53.727Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "wpForo Forum",
          "vendor": "tomdever",
          "versions": [
            {
              "lessThanOrEqual": "3.1.5",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jonah Burgess (CryptoCat)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author\u0027s forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author\u0027s email address."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-22T07:41:13.210Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/97084759-a8fb-4b26-a6fa-93d005b1110e?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Posts.php#L319"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/functions.php#L2820"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Members.php#L3704"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Actions.php#L806"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/hooks.php#L1004"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3702319%40wpforo\u0026new=3702319%40wpforo"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-14T18:24:03.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-21T19:01:21.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "wpForo Forum \u003c= 3.1.5 - Missing Authorization to Authenticated (Subscriber+) Guest Post Takeover via wpforo_post_edit Action / Forged comment_author_email Cookie"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-91092",
    "datePublished": "2026-09-22T07:41:13.210Z",
    "dateReserved": "2026-09-14T18:11:51.829Z",
    "dateUpdated": "2026-09-23T18:46:53.727Z",
    "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.

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.

Action not permitted

GHSA-439G-QG26-VJWW

CVE-2026-91092 (GCVE-0-2026-91092)

Tags

Sightings

Nomenclature

Related by attack behaviour