Vulnerability-Lookup

GHSA-9G3C-R4J4-8M9R

Vulnerability from github – Published: 2026-07-02 12:30 – Updated: 2026-07-02 12:30

Details

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.

Severity

7.2 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-9834"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-02T10:16:29Z",
    "severity": "HIGH"
  },
  "details": "The WP Database Backup \u2013 Unlimited Database \u0026 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 `$_POST[\u0027wp_db_exclude_table\u0027]` values into the `mysqldump` shell command string in the `mysqldump()` function of `includes/admin/class-wpdb-admin.php` without wrapping them in `escapeshellarg()`\u2014every other argument in the same command (DB_USER, DB_PASSWORD, host, filename, DB_NAME) is properly escaped, making the exclude-table values the sole exception\u2014and because the only applied filtering, `sanitize_text_field()` via `recursive_sanitize_text_field()`, strips HTML tags but leaves shell metacharacters such as `;`, `|`, `` ` ``, and `$()` 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(\u0027wp_db_exclude_table\u0027)` and later retrieved with `get_option()` and passed unsanitized to `shell_exec()` whenever a backup operation runs.",
  "id": "GHSA-9g3c-r4j4-8m9r",
  "modified": "2026-07-02T12:30:59Z",
  "published": "2026-07-02T12:30:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9834"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L216"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L2644"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.10/includes/admin/class-wpdb-admin.php#L2654"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L216"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L2644"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wp-database-backup/tags/7.11/includes/admin/class-wpdb-admin.php#L2654"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3574273%40wp-database-backup\u0026new=3574273%40wp-database-backup\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0a97a217-b00b-4268-a472-8d62ae1d18e3?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-9834 (GCVE-0-2026-9834)

Vulnerability from cvelistv5 – Published: 2026-07-02 08:33 – Updated: 2026-07-02 12:24

Title

WP Database Backup <= 7.11 - Authenticated (Administrator+) OS Command Injection via 'wp_db_exclude_table' Parameter

Summary

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.

Severity

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Assigner

Wordfence

References

8 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/browser/wp-dat…
https://plugins.trac.wordpress.org/changeset?sfp_…

Impacted products

1 product

Vendor	Product	Version
databasebackup	WP Database Backup – Unlimited Database & Files Backup by Backup for WP	Affected: 0 , ≤ 7.11 (semver)

Credits

Irwan Kusuma

Show details on NVD website

JSON

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                "id": "CVE-2026-9834",
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                  },
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                    "Technical Impact": "total"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-07-02T12:24:37.163009Z",
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          "value": "Irwan Kusuma"
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      "descriptions": [
        {
          "lang": "en",
          "value": "The WP Database Backup \u2013 Unlimited Database \u0026 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 `$_POST[\u0027wp_db_exclude_table\u0027]` values into the `mysqldump` shell command string in the `mysqldump()` function of `includes/admin/class-wpdb-admin.php` without wrapping them in `escapeshellarg()`\u2014every other argument in the same command (DB_USER, DB_PASSWORD, host, filename, DB_NAME) is properly escaped, making the exclude-table values the sole exception\u2014and because the only applied filtering, `sanitize_text_field()` via `recursive_sanitize_text_field()`, strips HTML tags but leaves shell metacharacters such as `;`, `|`, `` ` ``, and `$()` 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(\u0027wp_db_exclude_table\u0027)` and later retrieved with `get_option()` and passed unsanitized to `shell_exec()` whenever a backup operation runs."
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          "time": "2026-07-01T00:00:00.000Z",
          "value": "Disclosed"
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      ],
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9G3C-R4J4-8M9R

CVE-2026-9834 (GCVE-0-2026-9834)

Tags

Sightings

Nomenclature