databasebackup WP Database Backup Plugin up to 7.11 on WordPress Setting class-wpdb-admin.php mysqldump wp_db_exclude_table command injection

Summaryinfo

A vulnerability was found in databasebackup WP Database Backup Plugin up to 7.11 on WordPress. It has been declared as critical. This issue affects the function mysqldump of the file includes/admin/class-wpdb-admin.php of the component Setting Handler. Executing a manipulation of the argument wp_db_exclude_table can lead to command injection. This vulnerability appears as CVE-2026-9834. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in databasebackup WP Database Backup Plugin up to 7.11 on WordPress and classified as critical. This vulnerability affects the function mysqldump of the file includes/admin/class-wpdb-admin.php of the component Setting Handler. The manipulation of the argument wp_db_exclude_table with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The WP Database Backup – 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 `$_POST['wp_db_exclude_table']` values into the `mysqldump` shell command string in the `mysqldump()` function of `includes/admin/class-wpdb-admin.php` without wrapping them in `escapeshellarg()`—every other argument in the same command (DB_USER, DB_PASSWORD, host, filename, DB_NAME) is properly escaped, making the exclude-table values the sole exception—and because the only applied filtering, `sanitize_text_field()` via `recursive_sanitize_text_field()`, strips HTML tags but leaves shell metacharacters such as `;`, `|`, `` ` ``, and `$()` 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.

The weakness was presented by Irwan Kusuma. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-9834 since 05/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

By approaching the search of inurl:includes/admin/class-wpdb-admin.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 7.10 eliminates this vulnerability.

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Productinfo

Type

• Backup Software

Vendor

• databasebackup

Name

• WP Database Backup Plugin

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7
• 7.8
• 7.9
• 7.10
• 7.11

CPE 2.3info

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CPE 2.2info

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