CVE-2026-54820 Overview
CVE-2026-54820 is an unauthenticated SQL injection vulnerability in the JetBooking WordPress plugin versions <= 4.0.4.1. The flaw is classified under CWE-89, Improper Neutralization of Special Elements used in an SQL Command. Remote attackers can inject SQL statements without authentication or user interaction, reaching the underlying database through the plugin's booking-related request handlers. The issue was published to the National Vulnerability Database (NVD) on 2026-06-26 and disclosed by Patchstack.
Critical Impact
Unauthenticated attackers can execute arbitrary SQL queries against the WordPress database, enabling data extraction and manipulation across a scope-changed boundary.
Affected Products
- JetBooking WordPress plugin versions <= 4.0.4.1
- WordPress sites running vulnerable JetBooking releases
- Any hosting environment exposing the plugin to network-reachable requests
Discovery Timeline
- 2026-06-26 - CVE-2026-54820 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-54820
Vulnerability Analysis
The vulnerability resides in JetBooking request handling code that concatenates untrusted input into SQL statements without parameterization or escaping. Because the affected endpoints do not require authentication, any remote client can reach the vulnerable code path over HTTP. The scope change indicated in the vector reflects that database contents accessed through the plugin extend beyond the plugin's own security boundary, affecting the broader WordPress installation.
Exploitation of [CWE-89] flaws typically permits data exfiltration from wp_users, wp_usermeta, and plugin tables, including hashed credentials, session tokens, and booking records containing personally identifiable information. The EPSS probability at publication was 0.283% (percentile 20.097), indicating limited observed exploitation activity so far.
Root Cause
The root cause is missing input sanitization on user-supplied parameters consumed by SQL query construction inside JetBooking. Parameters that should be cast, whitelisted, or bound via prepared statements are instead interpolated directly into query strings, allowing attacker-controlled SQL fragments to alter query semantics.
Attack Vector
An attacker sends crafted HTTP requests to a vulnerable JetBooking endpoint with SQL metacharacters embedded in parameters processed by the plugin. No credentials, tokens, or user interaction are required. Refer to the Patchstack SQL Injection Advisory for technical specifics on the affected parameters and endpoints. No public proof-of-concept exploit is currently listed.
Detection Methods for CVE-2026-54820
Indicators of Compromise
- HTTP requests to JetBooking endpoints containing SQL syntax such as UNION SELECT, SLEEP(, BENCHMARK(, INFORMATION_SCHEMA, or comment markers -- and /*.
- Anomalous outbound database query latency correlating with inbound requests to /wp-admin/admin-ajax.php or REST routes tied to jet-booking.
- Unexpected reads against wp_users or wp_usermeta originating from the web application user.
Detection Strategies
- Deploy WAF signatures for SQL injection patterns targeting WordPress AJAX and REST endpoints associated with JetBooking.
- Enable MySQL general or slow query logging and alert on queries referencing information_schema from the WordPress application account.
- Correlate web access logs with database error responses (HTTP 500) that follow parameter tampering attempts.
Monitoring Recommendations
- Baseline normal request parameters to JetBooking endpoints and alert on deviations containing SQL operators.
- Monitor authentication tables for out-of-band read patterns and new administrator accounts.
- Track file integrity on the plugin directory to detect follow-on webshell placement after successful data extraction.
How to Mitigate CVE-2026-54820
Immediate Actions Required
- Upgrade JetBooking to a version later than 4.0.4.1 as published in the Patchstack SQL Injection Advisory.
- Rotate WordPress administrator passwords, API keys, and secret keys in wp-config.php if exploitation is suspected.
- Audit the database for unauthorized rows in wp_users and unexpected option changes in wp_options.
Patch Information
Update JetBooking to a fixed release beyond version 4.0.4.1. Consult the vendor advisory referenced by Patchstack for the exact patched version and changelog entries confirming remediation of the [CWE-89] SQL injection flaw.
Workarounds
- Deactivate the JetBooking plugin until patching is possible if the site cannot be updated immediately.
- Apply virtual patching at the WAF layer to block SQL metacharacters on JetBooking request parameters.
- Restrict database privileges for the WordPress account to the minimum required, denying FILE and cross-database access.
# Configuration example: WP-CLI update workflow
wp plugin update jet-booking --version=<fixed-version>
wp plugin list --name=jet-booking --fields=name,status,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
