{"cve":{"cve_id":"CVE-2026-4666","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00331,"epss_percentile":0.24718,"epss_as_of":"2026-06-23","description":"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.","published_at":"2026-04-17T02:25:04.892000Z","last_modified_at":null,"cvss_v3_score":6.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-862"],"nvd_references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/049ffab1-677d-4112-9f1d-092ee01299f1?source=cve","https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L283","https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L285","https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Actions.php#L773","https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/includes/functions.php#L532","https://wordpress.org/plugins/wpforo/","https://ti.wordfence.io/vendors/patch/1885/download","https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforo/tags/2.4.16&new_path=%2Fwpforo/tags/2.4.17"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:38.837790Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"tomdever","vendor_name":"tomdever","product_slug":"wpforo-forum","product_name":"wpForo Forum","version_start":"0","version_start_inclusive":true,"version_end":"2.4.16","version_end_inclusive":true,"cpe23_uri":"cve5:tomdever:wpforo-forum:0:2.4.16"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/049ffab1-677d-4112-9f1d-092ee01299f1?source=cve","source_type":"MISC","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L283","source_type":"MISC","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Posts.php#L285","source_type":"MISC","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/classes/Actions.php#L773","source_type":"MISC","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/wpforo/tags/2.4.16/includes/functions.php#L532","source_type":"MISC","tags":[]},{"url":"https://wordpress.org/plugins/wpforo/","source_type":"MISC","tags":[]},{"url":"https://ti.wordfence.io/vendors/patch/1885/download","source_type":"MISC","tags":["patch"]},{"url":"https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforo/tags/2.4.16&new_path=%2Fwpforo/tags/2.4.17","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-04-17T02:25:04.892000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:55:17.036284Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:17.036284Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:17.036284Z","label":"CVSS score revised","source":"cvelistv5"}]}