Description

Unauthenticated SQL Injection in Simply Schedule Appointments <= 1.6.12.10 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.3",
  "pubDate": "2026-08-06T15:17:14.957Z",
  "pubdate": "2026-08-06T15:17:14.957Z",
  "executiveSummary": "An unauthenticated SQL Injection vulnerability has been identified in the Simply Schedule Appointments plugin, specifically affecting versions 1.6.12.10 and prior. This security flaw arises from improper neutralization of user-supplied input before it is concatenated into database queries within the plugin's codebase.\nThe vulnerability allows remote, unauthenticated attackers to inject malicious SQL statements directly into the underlying database. Successful exploitation of this flaw can lead to unauthorized access, data exfiltration, modification or deletion of sensitive database contents, and potentially complete compromise of the WordPress site depending on database privileges.\nThe risk implications are critical, as the attack requires no prior authentication, interaction, or privileged access to the affected system, lowering the barrier to entry for malicious actors. The primary remediation strategy involves updating the Simply Schedule Appointments plugin to a patched version where input sanitization and parameterized queries are properly implemented.",
  "technicalDetails": "The vulnerability is classified as an SQL Injection (SQLi), stemming from the failure of the application to properly validate, sanitize, or parameterize user-supplied input parameters before processing them within database queries.\nThe affected component resides within the Simply Schedule Appointments plugin for WordPress, specifically impacting versions 1.6.12.10 and earlier. The flaw is exposed over the network via HTTP/HTTPS requests processed by the plugin's unauthenticated endpoints or AJAX handlers.\nExploitation requires zero authentication and no specific user privileges, meaning any remote attacker can interact directly with the vulnerable web application interface exposed to the public internet.\nThe attack flow proceeds as follows: First, the attacker identifies an input vector within the Simply Schedule Appointments plugin that improperly handles parameters passed to database query functions. Second, the attacker crafts a malicious HTTP request containing a specialized SQL payload designed to manipulate the logical structure of the database query. Third, the application receives the unsanitized input and concatenates it directly into the SQL statement executed by the database management system. Fourth, the database executes the altered query, allowing the attacker to bypass access controls, extract sensitive information such as user credentials and site data, or execute arbitrary database commands.\nPost-exploitation impact includes unauthorized data disclosure (such as extraction of the wp_users table), potential privilege escalation via credential theft, and database integrity compromise through data manipulation or insertion."
}