CVE-2023-6620: unknown post smtp mailer SQL Injection

Vulnerability summary

CVE-2023-6620 is a high (CVSS 7.2) SQL Injection vulnerability in unknown post smtp mailer. EPSS estimates a 14.06% chance of exploitation in the next 30 days, higher than 96.5% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 15-01-2024
   PublishedVulnerability first disclosed.
2. 20-06-2025
   Last modifiedVulnerability information updated.

Description

The POST SMTP Mailer WordPress plugin before 2.8.7 does not properly sanitise and escape several parameters before using them in SQL statements, leading to a SQL injection exploitable by high privilege users such as admin.

• CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.