CVE-2025-12850 Overview
The My Auctions Allegro plugin for WordPress contains a SQL Injection vulnerability in the auction_id parameter. The flaw affects all versions up to and including 3.6.32. Unauthenticated attackers can append additional SQL queries to existing database queries. This allows extraction of sensitive information from the WordPress database without any authentication or user interaction. The vulnerability falls under [CWE-89] (Improper Neutralization of Special Elements used in an SQL Command) and stems from insufficient escaping of user-supplied input combined with inadequate query preparation.
Critical Impact
Unauthenticated remote attackers can extract sensitive database content, including user credentials, session tokens, and configuration data, through crafted requests to the vulnerable auction_id parameter.
Affected Products
- My Auctions Allegro plugin for WordPress — all versions up to and including 3.6.32
- WordPress sites running the Free Edition of the plugin
- Any WordPress deployment exposing the vulnerable auction_id endpoint
Discovery Timeline
- 2025-12-05 - CVE-2025-12850 published to NVD
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-12850
Vulnerability Analysis
The vulnerability resides in how the My Auctions Allegro plugin processes the auction_id parameter within its database query logic. The plugin accepts the parameter from user-supplied input and concatenates it into a SQL statement without proper escaping. The plugin also fails to use prepared statements via WordPress's $wpdb->prepare() function. Attackers can break out of the intended query context and append arbitrary SQL clauses such as UNION SELECT statements. This enables direct extraction of data from any table the database user can access, including wp_users and wp_usermeta.
Root Cause
The root cause is a combination of two defects classified under [CWE-89]. First, the plugin does not sanitize or type-cast the auction_id value before use. Second, the SQL query is constructed through string interpolation rather than parameterized binding. WordPress provides esc_sql(), absint(), and $wpdb->prepare() to prevent this class of flaw, none of which were applied to the vulnerable code path.
Attack Vector
The vulnerability is exploitable over the network with no authentication and no user interaction. An attacker sends an HTTP request to the WordPress endpoint that accepts the auction_id parameter and injects SQL syntax. Because the plugin executes the resulting query against the WordPress database, the attacker can retrieve arbitrary data. The vulnerability impacts confidentiality but does not directly modify data or affect availability based on the published CVSS vector.
No verified public proof-of-concept code is available at this time. Technical details of the fix are visible in the WordPress Plugin Changeset and the Wordfence Vulnerability Report.
Detection Methods for CVE-2025-12850
Indicators of Compromise
- HTTP requests containing SQL syntax such as UNION, SELECT, SLEEP(, or -- in the auction_id parameter
- Unexpected database errors in PHP or WordPress logs referencing the plugin's query path
- Outbound responses with unusually large payloads following requests to plugin endpoints
- Presence of plugin versions 3.6.32 or earlier in wp-content/plugins/my-auctions-allegro-free-edition/
Detection Strategies
- Inspect web server access logs for non-numeric values or URL-encoded SQL keywords in the auction_id query string
- Deploy a Web Application Firewall (WAF) rule that blocks SQL metacharacters on plugin endpoints
- Audit installed WordPress plugins and compare versions against the patched release
- Correlate authentication failures and password reset events with prior suspicious plugin requests
Monitoring Recommendations
- Enable WordPress debug logging and forward errors to a centralized log platform
- Monitor database query latency for anomalies consistent with time-based SQL injection probes
- Alert on repeated 500-series HTTP responses from plugin URLs
- Track outbound data volumes from the web tier to identify mass data extraction
How to Mitigate CVE-2025-12850
Immediate Actions Required
- Update the My Auctions Allegro plugin to the version published in changeset 3402268 or later
- If patching is not immediately possible, deactivate and remove the plugin from all WordPress installations
- Rotate WordPress administrator credentials and any database credentials that may have been exposed
- Review user accounts for unauthorized additions or privilege changes
Patch Information
The vendor addressed the vulnerability in the plugin update referenced by the WordPress Plugin Changeset 3402268. The fix applies proper escaping and query preparation to the auction_id parameter. Site administrators should apply the update through the WordPress plugin manager or via WP-CLI.
Workarounds
- Block requests containing SQL metacharacters in the auction_id parameter at the WAF or reverse proxy
- Restrict access to plugin endpoints by IP allowlist where feasible
- Enforce least-privilege on the WordPress database user to limit data accessible through injection
- Deploy virtual patching rules provided by reputable WordPress security vendors until the official update is applied
# Update the plugin via WP-CLI
wp plugin update my-auctions-allegro-free-edition
# Verify installed version
wp plugin get my-auctions-allegro-free-edition --field=version
# If unable to patch, deactivate immediately
wp plugin deactivate my-auctions-allegro-free-edition
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
