Vulnerability-Lookup

GHSA-GQ2V-MWV7-CVM2

Vulnerability from github – Published: 2026-04-17 06:31 – Updated: 2026-04-17 06:31

Details

The wpForo Forum plugin for WordPress is vulnerable to unauthorized modification of data due to the use of extract($args, EXTR_OVERWRITE) on user-controlled input in the edit() method of classes/Posts.php in all versions up to, and including, 2.4.16. The post_edit action handler in Actions.php passes $_REQUEST['post'] directly to Posts::edit(), which calls extract($args, EXTR_OVERWRITE). An attacker can inject post[guestposting]=1 to overwrite the local $guestposting variable, causing the entire permission check block to be skipped. The nonce check uses a hardcoded wpforo_verify_form action shared across all 8 forum templates, so any user who can view any forum page obtains a valid nonce. This makes it possible for authenticated attackers, with Subscriber-level access and above, to edit the title, body, name, and email fields of any forum post, including posts in private forums, admin posts, and moderator posts. Content passes through wpforo_kses() which strips JavaScript but allows rich HTML.

Severity ?

6.5 (Medium)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-4666"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-17T04:16:11Z",
    "severity": "MODERATE"
  },
  "details": "The wpForo Forum plugin for WordPress is vulnerable to unauthorized modification of data due to the use of `extract($args, EXTR_OVERWRITE)` on user-controlled input in the `edit()` method of `classes/Posts.php` in all versions up to, and including, 2.4.16. The `post_edit` action handler in `Actions.php` passes `$_REQUEST[\u0027post\u0027]` directly to `Posts::edit()`, which calls `extract($args, EXTR_OVERWRITE)`. An attacker can inject `post[guestposting]=1` to overwrite the local `$guestposting` variable, causing the entire permission check block to be skipped. The nonce check uses a hardcoded `wpforo_verify_form` action shared across all 8 forum templates, so any user who can view any forum page obtains a valid nonce. This makes it possible for authenticated attackers, with Subscriber-level access and above, to edit the title, body, name, and email fields of any forum post, including posts in private forums, admin posts, and moderator posts. Content passes through `wpforo_kses()` which strips JavaScript but allows rich HTML.",
  "id": "GHSA-gq2v-mwv7-cvm2",
  "modified": "2026-04-17T06:31:07Z",
  "published": "2026-04-17T06:31:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4666"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Actions.php#L773"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L283"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L285"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/includes/functions.php#L532"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforo/tags/2.4.16\u0026new_path=%2Fwpforo/tags/2.4.17"
    },
    {
      "type": "WEB",
      "url": "https://ti.wordfence.io/vendors/patch/1885/download"
    },
    {
      "type": "WEB",
      "url": "https://wordpress.org/plugins/wpforo"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/049ffab1-677d-4112-9f1d-092ee01299f1?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:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-4666 (GCVE-0-2026-4666)

Vulnerability from cvelistv5 – Published: 2026-04-17 02:25 – Updated: 2026-04-20 14:59

Title

wpForo Forum <= 2.4.16 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Forum Post Modification via 'guestposting' Parameter

Summary

The wpForo Forum plugin for WordPress is vulnerable to unauthorized modification of data due to the use of `extract($args, EXTR_OVERWRITE)` on user-controlled input in the `edit()` method of `classes/Posts.php` in all versions up to, and including, 2.4.16. The `post_edit` action handler in `Actions.php` passes `$_REQUEST['post']` directly to `Posts::edit()`, which calls `extract($args, EXTR_OVERWRITE)`. An attacker can inject `post[guestposting]=1` to overwrite the local `$guestposting` variable, causing the entire permission check block to be skipped. The nonce check uses a hardcoded `wpforo_verify_form` action shared across all 8 forum templates, so any user who can view any forum page obtains a valid nonce. This makes it possible for authenticated attackers, with Subscriber-level access and above, to edit the title, body, name, and email fields of any forum post, including posts in private forums, admin posts, and moderator posts. Content passes through `wpforo_kses()` which strips JavaScript but allows rich HTML.

Severity ?

6.5 (Medium)


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

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence

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://wordpress.org/plugins/wpforo/
	https://ti.wordfence.io/vendors/patch/1885/download
	https://plugins.trac.wordpress.org/changeset?old_…

Impacted products

	Vendor	Product	Version
	tomdever	wpForo Forum	Affected: 0 , ≤ 2.4.16 (semver)

Credits

Jared Reyes

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4666",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T14:31:11.800069Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-20T14:59:31.196Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "wpForo Forum",
          "vendor": "tomdever",
          "versions": [
            {
              "lessThanOrEqual": "2.4.16",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jared Reyes"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The wpForo Forum plugin for WordPress is vulnerable to unauthorized modification of data due to the use of `extract($args, EXTR_OVERWRITE)` on user-controlled input in the `edit()` method of `classes/Posts.php` in all versions up to, and including, 2.4.16. The `post_edit` action handler in `Actions.php` passes `$_REQUEST[\u0027post\u0027]` directly to `Posts::edit()`, which calls `extract($args, EXTR_OVERWRITE)`. An attacker can inject `post[guestposting]=1` to overwrite the local `$guestposting` variable, causing the entire permission check block to be skipped. The nonce check uses a hardcoded `wpforo_verify_form` action shared across all 8 forum templates, so any user who can view any forum page obtains a valid nonce. This makes it possible for authenticated attackers, with Subscriber-level access and above, to edit the title, body, name, and email fields of any forum post, including posts in private forums, admin posts, and moderator posts. Content passes through `wpforo_kses()` which strips JavaScript but allows rich HTML."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-04-17T02:25:04.892Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/049ffab1-677d-4112-9f1d-092ee01299f1?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L283"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L285"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Actions.php#L773"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/includes/functions.php#L532"
        },
        {
          "url": "https://wordpress.org/plugins/wpforo/"
        },
        {
          "url": "https://ti.wordfence.io/vendors/patch/1885/download"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforo/tags/2.4.16\u0026new_path=%2Fwpforo/tags/2.4.17"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-23T17:52:06.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-04-16T14:05:14.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "wpForo Forum \u003c= 2.4.16 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Forum Post Modification via \u0027guestposting\u0027 Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-4666",
    "datePublished": "2026-04-17T02:25:04.892Z",
    "dateReserved": "2026-03-23T17:36:42.531Z",
    "dateUpdated": "2026-04-20T14:59:31.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-GQ2V-MWV7-CVM2

CVE-2026-4666 (GCVE-0-2026-4666)

Tags

Sightings

Nomenclature