{
  "containers": {
    "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "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": "2026-04-17T02:25:04.892Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-4666",
      "date": "2026-04-19",
      "epss": "0.00012",
      "percentile": "0.01609"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-4666\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-04-17T04:16:11.023\",\"lastModified\":\"2026-04-17T04:16:11.023\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-862\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Actions.php#L773\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L283\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L285\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/includes/functions.php#L532\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforo/tags/2.4.16\u0026new_path=%2Fwpforo/tags/2.4.17\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://ti.wordfence.io/vendors/patch/1885/download\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://wordpress.org/plugins/wpforo/\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/049ffab1-677d-4112-9f1d-092ee01299f1?source=cve\",\"source\":\"security@wordfence.com\"}]}}"
  }
}