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CVE-2026-12741 – Unauthenticated SQL Injection – WP Fast Total Search WordPress Plugin (≤ 1.80.280)

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Summary

CVE-2026-12741 is a high-severity unauthenticated SQL injection vulnerability affecting the WP Fast Total Search – The Power of Indexed Search WordPress plugin (all versions up to and including 1.80.280), developed by Epsiloncool. Due to insufficient escaping of user-supplied input and improper SQL query preparation, unauthenticated remote attackers can append malicious SQL statements to existing queries and extract sensitive data from the underlying WordPress database. The vulnerability carries a CVSS v3.1 base score of 7.5 (HIGH).

Technical details

  • Root cause: Insufficient escaping of the user-supplied form_data[s] parameter combined with a lack of proper SQL query preparation, allowing raw attacker-controlled input to be incorporated into executed SQL queries.
  • Trigger conditions: No authentication, no user interaction, and no special configuration are required — the vulnerable parameter is accessible on any site running the affected plugin version.
  • Attack vector: Network-accessible HTTP request targeting the form_data[s] parameter; the plugin’s search functionality is front-end facing and publicly reachable on any WordPress site using the plugin.
  • Impact: Unauthenticated attackers can perform generic SQL injection to read arbitrary data from the WordPress database, including user credentials and password hashes stored in the wp_users table, private post content, and other sensitive records. Successful extraction of administrator password hashes can facilitate full site takeover through offline cracking.

Affected software

  • WP Fast Total Search – The Power of Indexed Search (plugin slug: fulltext-search), all versions up to and including 1.80.280

Severity

  • CVSS v3.1 Base Score: 7.5 (HIGH)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • CWE: CWE-89 – Improper Neutralization of Special Elements Used in an SQL Command

Mitigation and recommended actions

  • Immediate: Update the plugin to version 1.81.282 or later. The plugin’s official changelog explicitly identifies version 1.81.282 as an important security fix for this SQL injection vulnerability. Updates are available directly through the WordPress plugin repository at https://wordpress.org/plugins/fulltext-search/.
  • If immediate patching is not feasible: Consider temporarily deactivating the plugin and blocking external access to search endpoints at the WAF or network perimeter level until the update can be applied.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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