CVE-2026-42755 Overview
CVE-2026-42755 is a blind SQL injection vulnerability in the RealMag777 TableOn WordPress plugin (posts-table-filterable). The flaw affects all versions up to and including 1.0.5.1. Improper neutralization of special elements in SQL commands [CWE-89] allows unauthenticated attackers to inject arbitrary SQL statements through the plugin. The vulnerability is exploitable over the network without authentication or user interaction. Successful exploitation can expose sensitive database contents, including WordPress user records and configuration data.
Critical Impact
Unauthenticated attackers can extract sensitive data from the WordPress database through blind SQL injection, with scope-changing impact across the affected site.
Affected Products
- RealMag777 TableOn (posts-table-filterable) plugin versions through 1.0.5.1
- WordPress installations with the vulnerable plugin enabled
- Sites using TableOn for filterable post tables
Discovery Timeline
- 2026-05-27 - CVE-2026-42755 published to NVD
- 2026-05-27 - Last updated in NVD database
Technical Details for CVE-2026-42755
Vulnerability Analysis
The TableOn plugin constructs SQL queries using attacker-controlled input without proper sanitization or parameterization. This violates safe database query practices defined in [CWE-89]. The blind SQL injection variant means the application does not return query results directly in responses. Attackers infer database contents through boolean conditions or time-based payloads that alter application behavior.
The vulnerability has a scope change characteristic, meaning exploitation can affect resources beyond the vulnerable component itself. In WordPress, this typically corresponds to database access that extends beyond the plugin's intended data boundaries. Attackers can iterate through tables such as wp_users and wp_options to extract password hashes, session tokens, and API credentials.
Root Cause
The root cause is improper neutralization of special characters in SQL commands. The plugin accepts user-supplied parameters used in filtering and sorting operations on post tables. These parameters are concatenated into SQL statements rather than passed through prepared statements or the WordPress $wpdb->prepare() API.
Attack Vector
An unauthenticated remote attacker sends crafted HTTP requests to endpoints exposed by the TableOn plugin. The malicious parameters embed SQL syntax such as boolean conditions, UNION clauses, or SLEEP() calls. The server executes the modified query against the WordPress database. The attacker observes response differences or timing delays to extract data character by character.
The vulnerability manifests in the plugin's request handlers that process filter and query parameters. See the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-42755
Indicators of Compromise
- HTTP requests to TableOn plugin endpoints containing SQL keywords such as UNION, SELECT, SLEEP, BENCHMARK, or INFORMATION_SCHEMA
- Repeated requests with incrementing parameter values consistent with blind SQL extraction
- Anomalous response time patterns matching time-based injection probes
- Unexpected database queries against wp_users or wp_options originating from the plugin
Detection Strategies
- Deploy Web Application Firewall (WAF) rules matching SQL injection signatures on requests targeting posts-table-filterable paths
- Enable MySQL general query logging temporarily and review for malformed or suspicious queries from the plugin
- Monitor WordPress error logs for SQL syntax errors that indicate probing activity
- Correlate authentication anomalies with prior database access patterns suggesting credential extraction
Monitoring Recommendations
- Alert on high request volumes to TableOn plugin endpoints from a single source IP
- Track outbound responses with abnormally large payload sizes from filtered table pages
- Baseline normal query timing and flag deviations consistent with SLEEP-based exploitation
- Forward WordPress and database logs to a centralized SIEM for correlation across multiple sites
How to Mitigate CVE-2026-42755
Immediate Actions Required
- Disable the TableOn (posts-table-filterable) plugin on all WordPress sites until a patched version is installed
- Audit the WordPress database for evidence of unauthorized access or modified records
- Rotate WordPress administrator passwords, API keys, and secrets stored in wp_options
- Restrict access to WordPress admin and plugin endpoints by IP where feasible
Patch Information
No patched version is listed in the NVD record at publication. Affected versions span from initial release through 1.0.5.1. Monitor the Patchstack Vulnerability Report and the WordPress plugin repository for an updated release addressing CVE-2026-42755.
Workarounds
- Remove the TableOn plugin entirely if a patched version is not yet available
- Apply WAF virtual patching rules that block SQL metacharacters in TableOn request parameters
- Enforce least-privilege database credentials for the WordPress user to limit injection impact
- Enable database query logging and review activity originating from the plugin
# Disable the vulnerable plugin via WP-CLI until a patch is available
wp plugin deactivate posts-table-filterable
wp plugin delete posts-table-filterable
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
