{"id":"CVE-2026-86583","published":"2026-09-23T22:16:59.220","lastModified":"2026-09-24T14:42:02.707","description":"The Import and export users and customers plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.4.17 via the plugin's own export and re-import workflow. The vulnerability exists because the exporter writes CSV cells using fputcsv() with a NUL byte (\\0) as the escape character, while the importer parses the same file using SplFileObject::fgetcsv() with only a single delimiter argument, causing PHP's default backslash escape character to be applied instead; because the export column layout places display_name immediately before the role column and nickname immediately after, an attacker can store crafted values in those two profile fields — saved by WordPress core via the standard profile page — such that the escape mismatch causes the parser to merge the display_name cell into the role field and rebalance the column count via nickname, yielding administrator as the parsed role for their own row when it reaches the import_user function's add_role function. This makes it possible for authenticated attackers with Subscriber-level access or above to escalate their privileges to Administrator. Exploitation requires a site administrator to trigger the plugin's documented export re-import migration with both \"Update existing users\" and \"Update roles for existing users\" set to \"yes\".","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-266"],"vendors":[],"products":[],"references":[{"url":"https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags/2.4.17/classes/batch_exporter.php#L459","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags/2.4.17/classes/helper.php#L78","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags/2.4.17/classes/import.php#L1356","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags/2.4.17/classes/import.php#L872","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags/2.4.17/classes/import.php#L888","tags":[]},{"url":"https://plugins.trac.wordpress.org/changeset/3687349/import-users-from-csv-with-meta","tags":[]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/5b0f3444-4c10-45ce-a00b-4ed6038b8846?source=cve","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The vulnerability allows authenticated attackers with Subscriber-level access or above to escalate their privileges to Administrator by manipulating CSV files during the export and re-import process of the Import and export users and customers plugin for WordPress.","exploitability":"Exploitation requires a site administrator to trigger the plugin's export re-import migration with specific settings, making it moderately hard to exploit.","blast_radius":"If exploited, the attacker can gain full administrative control over the WordPress site, leading to potential data breaches and unauthorized access to sensitive information.","remediation":"Disable the affected plugin or upgrade to version 2.4.18 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","csv","wp-plugin"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T08:58:23.112Z"}}