{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4666", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-03-23T17:36:42.531Z", "datePublished": "2026-04-17T02:25:04.892Z", "dateUpdated": "2026-04-20T14:59:31.196Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-04-17T02:25:04.892Z"}, "affected": [{"vendor": "tomdever", "product": "wpForo Forum", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "2.4.16", "versionType": "semver"}], "defaultStatus": "unaffected"}], "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['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."}], "title": "wpForo Forum <= 2.4.16 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Forum Post Modification via 'guestposting' Parameter", "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&new_path=%2Fwpforo/tags/2.4.17"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-862 Missing Authorization", "cweId": "CWE-862", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "credits": [{"lang": "en", "type": "finder", "value": "Jared Reyes"}], "timeline": [{"time": "2026-03-23T17:52:06.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-04-16T14:05:14.000Z", "lang": "en", "value": "Disclosed"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-17T14:31:11.800069Z", "id": "CVE-2026-4666", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-20T14:59:31.196Z"}}]}}

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{"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['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."}], "id": "CVE-2026-4666", "lastModified": "2026-04-17T04:16:11.023", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-04-17T04:16:11.023", "references": [{"source": "security@wordfence.com", "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&new_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"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}