CVE-2026-9834

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "WP Database Backup \u2013 Unlimited Database & Files Backup by Backup for WP", "vendor": "databasebackup", "versions": [{"lessThanOrEqual": "7.11", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP Database Backup \u2013 Unlimited Database & Files Backup by Backup for WP plugin for WordPress is vulnerable to OS Command Injection in all versions up to and including 7.11 via the `wp_db_exclude_table` parameter. This is due to the direct concatenation of user-supplied `$_POST['wp_db_exclude_table']` values into the `mysqldump` shell command string in the `mysqldump()` function of `includes/admin/class-wpdb-admin.php` without wrapping them in `escapeshellarg()`\u2014every other argument in the same command (DB_USER, DB_PASSWORD, host, filename, DB_NAME) is properly escaped, making the exclude-table values the sole exception\u2014and because the only applied filtering, `sanitize_text_field()` via `recursive_sanitize_text_field()`, strips HTML tags but leaves shell metacharacters such as `;`, `|`, `` ` ``, and `$()` intact. This makes it possible for authenticated attackers, with administrator-level access and above, to execute arbitrary operating system commands on the server, potentially enabling full remote code execution. The injection is stored: malicious values submitted through the plugin settings form are persisted to the WordPress options table via `update_option('wp_db_exclude_table')` and later retrieved with `get_option()` and passed unsanitized to `shell_exec()` whenever a backup operation runs."}], "id": "CVE-2026-9834", "lastModified": "2026-07-02T13:58:56.870", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9834", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-02T12:24:37.163009Z", "version": "2.0.3"}}]}, "published": "2026-07-02T10:16:29.353", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L216"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L2644"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L2654"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L216"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L2644"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L2654"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3574273%40wp-database-backup&new=3574273%40wp-database-backup&sfp_email=&sfph_mail="}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0a97a217-b00b-4268-a472-8d62ae1d18e3?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

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