CVE-2026-49078: WP Travel Engine Security Vulnerability

CVE-2026-49078 Overview

CVE-2026-49078 is an unauthenticated input validation vulnerability affecting the WP Travel Engine WordPress plugin in versions up to and including 6.7.10. The flaw is categorized under [CWE-1284]: Improper Validation of Specified Quantity in Input. An unauthenticated attacker can reach the vulnerable code path over the network without user interaction, and successful exploitation impacts the integrity of data managed by the plugin. The vulnerability does not require privileges or user interaction, making it reachable from any internet-facing WordPress site running an affected version.

Critical Impact
Unauthenticated remote attackers can manipulate data integrity in WP Travel Engine installations running version 6.7.10 or earlier, exposing booking workflows and stored plugin data to tampering.

Affected Products

WP Travel Engine WordPress plugin versions <= 6.7.10
WordPress sites with the plugin installed and network-accessible
Travel and booking sites relying on WP Travel Engine for itinerary and reservation management

Discovery Timeline

2026-06-15 - CVE-2026-49078 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-49078

Vulnerability Analysis

The vulnerability stems from improper validation of a specified quantity in input handled by the WP Travel Engine plugin. An unauthenticated attacker can issue crafted HTTP requests over the network to trigger the flaw without any authentication, user interaction, or elevated privileges. Successful exploitation produces a high integrity impact, meaning attackers can modify data the plugin processes or stores. Confidentiality and availability are not directly affected based on the published vector, narrowing the practical outcome to tampering rather than data theft or service disruption. Specific technical details on the affected endpoint and parameter remain limited in public references at the time of disclosure.

Root Cause

The root cause maps to [CWE-1284], Improper Validation of Specified Quantity in Input. The plugin accepts a quantity value from a client-supplied input without enforcing the expected range, type, or business-logic constraints. Because the validation gap is reachable pre-authentication, the application processes attacker-controlled values as if they were legitimate. This allows downstream code to operate on out-of-bounds or unexpected quantities, leading to integrity violations in stored records or workflow state.

Attack Vector

The attack vector is network-based with low complexity. An attacker sends a crafted request to a vulnerable endpoint exposed by the plugin, supplying a quantity value outside the expected bounds. The server-side handler accepts the value and applies it to plugin operations, modifying state in ways the application logic did not intend. Refer to the Patchstack Vulnerability Report for additional disclosure details.

Detection Methods for CVE-2026-49078

Indicators of Compromise

Unexpected modifications to WP Travel Engine booking records, itineraries, or pricing fields without a corresponding authenticated admin session
Anomalous POST or REST API requests to WP Travel Engine endpoints containing out-of-range numeric parameters
Bursts of unauthenticated requests targeting /wp-json/ routes registered by the plugin

Detection Strategies

Inspect web server and WordPress access logs for unauthenticated requests to WP Travel Engine handlers carrying abnormally large, negative, or non-numeric quantity values
Compare current plugin data (bookings, trips, payments) against known-good backups to identify integrity drift
Deploy WordPress-aware WAF rules that flag input parameters exceeding expected numeric bounds for plugin endpoints

Monitoring Recommendations

Centralize WordPress, PHP, and web server logs and alert on spikes in 200-status requests to plugin REST routes from unauthenticated clients
Track plugin version inventory across sites and alert when any host runs WP Travel Engine <= 6.7.10
Monitor database write activity on plugin tables outside business hours or from non-admin contexts

How to Mitigate CVE-2026-49078

Immediate Actions Required

Update WP Travel Engine to a version newer than 6.7.10 as soon as the vendor-fixed release is available via the WordPress plugin repository
Audit existing bookings, orders, and trip data for unauthorized modifications since the plugin was installed
Restrict access to WP Travel Engine REST and AJAX endpoints behind a WAF until patching is complete

Patch Information

Refer to the Patchstack Vulnerability Report for the authoritative advisory and fixed-version guidance. Apply the vendor patch through the standard WordPress plugin update workflow and verify the installed version reports higher than 6.7.10 after deployment.

Workarounds

Deactivate the WP Travel Engine plugin on affected sites until a fixed version can be installed
Apply virtual patching at the WAF layer to reject requests to plugin endpoints containing numeric parameters outside expected ranges
Limit network exposure of vulnerable sites using IP allowlists or authentication proxies where feasible

bash

# Configuration example: WordPress CLI commands to inventory and update the plugin
wp plugin get wp-travel-engine --field=version
wp plugin update wp-travel-engine
wp plugin deactivate wp-travel-engine   # if no patched version is available yet