CVE-2026-59548: Byteflows Travel Booking Data Exposure

CVE-2026-59548 Overview

CVE-2026-59548 is an unauthenticated sensitive data exposure vulnerability affecting the Byteflows Travel & Hotel Booking WordPress plugin versions up to and including 1.0.0. The flaw allows remote attackers to retrieve sensitive information without authentication or user interaction over the network. The weakness is categorized under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere.

The vulnerability carries a network attack vector with low attack complexity and requires no privileges, making disclosure of exposed data trivial for attackers who can reach the target WordPress site.

Critical Impact
Unauthenticated remote attackers can access sensitive plugin data on affected WordPress sites, potentially exposing customer booking records, personal identifiers, or configuration details.

Affected Products

Byteflows Travel & Hotel Booking WordPress plugin, versions <= 1.0.0
WordPress installations with the plugin enabled
Sites exposing the plugin's endpoints to unauthenticated network traffic

Discovery Timeline

2026-07-27 - CVE-2026-59548 published to NVD
2026-07-27 - Last updated in NVD database

Technical Details for CVE-2026-59548

Vulnerability Analysis

The Byteflows Travel & Hotel Booking plugin exposes sensitive data through endpoints that lack proper authentication or authorization checks. Remote attackers can issue HTTP requests to the vulnerable interfaces and retrieve information the plugin should keep private. Because no credentials or user interaction are required, the barrier to exploitation is minimal.

The confidentiality impact is high, while integrity and availability remain unaffected. This aligns with a pure information disclosure flaw rather than a code execution or destructive weakness. Attackers can chain the disclosed data with follow-on attacks such as credential stuffing, targeted phishing, or reconnaissance against the WordPress environment.

Root Cause

The root cause is missing access control on plugin functionality that returns sensitive system or user information. Under CWE-497, the plugin discloses data to an unauthorized control sphere because it does not verify the caller's identity or role before returning the response. The Patchstack advisory catalogs the flaw as an unauthenticated sensitive data exposure issue in the plugin's request handling.

Attack Vector

An attacker sends unauthenticated HTTP requests to the vulnerable plugin endpoints on a target WordPress site. The server processes the request and returns sensitive data that should be gated behind authentication. No user interaction is required, and the attack can be scripted at scale against WordPress sites running the plugin. See the Patchstack Vulnerability Report for advisory details.

No public proof-of-concept code has been verified for this CVE at time of publication.

Detection Methods for CVE-2026-59548

Indicators of Compromise

Unauthenticated HTTP GET or POST requests to Byteflows Travel & Hotel Booking plugin paths under /wp-content/plugins/byteflows-travel-hotel-booking/
Anomalous request patterns from single IPs enumerating plugin endpoints
Elevated response sizes from plugin endpoints returning JSON or serialized data to unauthenticated clients

Detection Strategies

Inspect web server access logs for repeated unauthenticated requests to plugin routes, including AJAX and REST API paths registered by the plugin
Deploy WAF rules that alert on unauthenticated access to plugin endpoints returning structured data
Correlate WordPress audit logs with outbound response sizes to identify bulk data retrieval attempts

Monitoring Recommendations

Enable verbose logging on the WordPress REST API and admin-ajax.php handlers used by the plugin
Monitor for scanner user agents and known WordPress reconnaissance tooling targeting travel and booking plugins
Track version inventory across WordPress deployments to identify hosts still running plugin version <= 1.0.0

How to Mitigate CVE-2026-59548

Immediate Actions Required

Identify all WordPress sites running the Byteflows Travel & Hotel Booking plugin and confirm installed versions
Disable or deactivate the plugin on any site running version 1.0.0 or earlier until a patched release is available
Restrict access to the WordPress site via IP allowlisting or WAF rules where feasible
Review logs for prior unauthenticated access to plugin endpoints and rotate any credentials that may have been disclosed

Patch Information

At the time of publication, no fixed version is listed in the NVD entry for CVE-2026-59548. Monitor the Patchstack Vulnerability Report and the vendor's plugin repository for a security update. Apply the fixed release as soon as it becomes available.

Workarounds

Deactivate the Byteflows Travel & Hotel Booking plugin until a patched version is released
Add WAF rules that block unauthenticated requests to the plugin's REST and AJAX endpoints
Restrict access to WordPress administrative and plugin-specific routes to trusted networks
Audit stored data handled by the plugin and notify affected users if disclosure is suspected

bash

# Example WAF-style block for the vulnerable plugin path (adapt to your stack)
# ModSecurity rule concept - review and tune before deployment
SecRule REQUEST_URI "@contains /wp-content/plugins/byteflows-travel-hotel-booking/" \
  "id:1026595480,phase:1,deny,status:403,log,\
   msg:'Block unauthenticated access to Byteflows Travel & Hotel Booking plugin (CVE-2026-59548)'"