SQL Injection

I have a WordPress (v. 6.5.5) installation with complianz-GDPR plugin version 7.1.0 (free). Just after installing and activating the plugin, debug.log on the hosting server reported this error:

[24-Jun-2024 02:53:21 UTC] WordPress database error Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_unicode_520_ci,COERCIBLE) for operation ‘like’ for query SELECT SQL_CALC_FOUND_ROWS wp_posts.ID
FROM wp_posts
WHERE 1=1 AND (((wp_posts.post_title LIKE ‘%真実的1z0-1119-1｜信頼的な1z0-1119-1 無料ダウンロード試験｜試験の準備方法Oracle Cloud Infrastructure for Sunbird Ed Specialty – Rel 1 難易度 ?? URL ? https://www.goshiken.com ?をコピーして開き、【 1z0-1119-1 】を検索して無料でダウンロードしてください1z0-1119-1受験資料更新版%’) OR (wp_posts.post_excerpt LIKE ‘%真実的1z0-1119-1｜信頼的な1z0-1119-1 無料ダウンロード試験｜試験の準備方法Oracle Cloud Infrastructure for Sunbird Ed Specialty – Rel 1 難易度 ?? URL ? https://www.goshiken.com ?をコピーして開き、【 1z0-1119-1 】を検索して無料でダウンロードしてください1z0-1119-1受験資料更新版%’) OR (wp_posts.post_content LIKE ‘%真実的1z0-1119-1｜信頼的な1z0-1119-1 無料ダウンロード試験｜試験の準備方法Oracle Cloud Infrastructure for Sunbird Ed Specialty – Rel 1 難易度 ?? URL ? https://www.goshiken.com ?をコピーして開き、【 1z0-1119-1 】を検索して無料でダウンロードしてください1z0-1119-1受験資料更新版%’))) AND (wp_posts.post_password = ”) AND ((wp_posts.post_type = ‘post’ AND (wp_posts.post_status = ‘publish’ OR wp_posts.post_status = ‘acf-disabled’)) OR (wp_posts.post_type = ‘page’ AND (wp_posts.post_status = ‘publish’ OR wp_posts.post_status = ‘acf-disabled’)) OR (wp_posts.post_type = ‘attachment’ AND (wp_posts.post_status = ‘publish’ OR wp_posts.post_status = ‘acf-disabled’)) OR (wp_posts.post_type = ‘e-landing-page’ AND (wp_posts.post_status = ‘publish’ OR wp_posts.post_status = ‘acf-disabled’)))
ORDER BY (CASE WHEN wp_posts.post_title LIKE ‘%真実的1z0-1119-1｜信頼的な1z0-1119-1 無料ダウンロード試験｜試験の準備方法Oracle Cloud Infrastructure for Sunbird Ed Specialty – Rel 1 難易度 ?? URL ? https://www.goshiken.com ?をコピーして開き、【 1z0-1119-1 】を検索して無料でダウンロードしてください1z0-1119-1受験資料更新版%’ THEN 2 ELSE 6 END), wp_posts.post_date DESC
LIMIT 0, 10 made by require(‘wp-blog-header.php’), wp, WP->main, WP->query_posts, WP_Query->query, WP_Query->get_posts

It appears the database has been infected with possibly malicious contents. As a note, my website has nothing to do with China or chinese language.

Are you aware of any SQL injection vulnerabilities caused by complianz-GDPR plugin? In case, how can I fix the issue?

Thanks.

Cheers