CVE-2026-57643
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
The WP Post Author plugin version 3.9.1 and earlier contains a SQL injection vulnerability in the Contributor function. This allows an attacker to manipulate database queries.
Risk Assessment
The risk includes unauthorized access to data, its modification or deletion, which may lead to a breach of system confidentiality and integrity.
Recommendation
It is recommended to immediately update the WP Post Author plugin to a version newer than 3.9.1, which fixes this vulnerability.
Other vulnerabilities in WP Post Author <= 3.9.1
See all- CVE-2026-108125High
Improper neutralization of special elements used in an SQL command ('SQL injection') vulnerability in wp-post-author. This issue affects wp-post-author version 4.0.0 prior to 4.1.0.
- CVE-2026-108124Medium
The wp-post-author plugin contains an SQL injection vulnerability caused by improper neutralization of special elements in SQL commands. This issue affects versions before 4.1.0.
- CVE-2026-42708High
The WP Post Author plugin by AF themes contains a blind SQL injection vulnerability. The issue affects versions up to and including 4.0.0.
- CVE-2026-11977Medium
The WP Post Author plugin for WordPress is vulnerable to generic SQL Injection via the 'wpma_metabox_authors_list' parameter in all versions up to and including 3.9.1. Authenticated attackers with author-level access can append additional SQL queries to extract sensitive information from the database. Exploitation is a two-step chain involving saving a crafted guest-author token and triggering the injection when an admin loads the post list screen.
Original NVD description (English source)
Contributor SQL Injection in WP Post Author <= 3.9.1 versions.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS