CVE-2025-26956 Overview
CVE-2025-26956 is a Missing Authorization vulnerability [CWE-862] affecting the shinetheme Traveler WordPress theme. The flaw impacts all versions of Traveler up to and excluding 3.2.1. Attackers with low privileges can abuse missing authorization checks to access functionality that should require elevated permissions.
The vulnerability is network-exploitable and requires only low-privilege authentication. Successful exploitation can affect confidentiality and integrity at a limited scope while producing a high impact on availability. The Traveler theme is widely used on travel and booking-related WordPress sites, broadening the population of exposed deployments.
Critical Impact
Authenticated low-privilege users can bypass authorization controls in the Traveler theme to invoke protected actions, potentially disrupting site availability and tampering with booking-related data.
Affected Products
- shinetheme Traveler WordPress theme
- Traveler versions from n/a through versions prior to 3.2.1
- WordPress sites running the vulnerable Traveler theme as their active or installed theme
Discovery Timeline
- 2025-03-27 - CVE-2025-26956 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-26956
Vulnerability Analysis
The Traveler theme exposes functionality that fails to verify whether the requesting user holds the required capability or role. Classified under [CWE-862] Missing Authorization, the issue allows requests to reach sensitive handlers without the server enforcing an access control decision. Authentication is required, but authentication alone is treated as sufficient, which violates the principle of least privilege.
Because the attack vector is network-based and complexity is low, an authenticated subscriber-level account is enough to reach the vulnerable code paths. The exposed actions can alter or read data they should not, and can drive the site into a degraded state. The EPSS probability is currently low, but the simplicity of the access pattern keeps the practical risk meaningful for production sites.
Root Cause
The root cause is the absence of capability or nonce-based authorization checks on theme endpoints. WordPress themes that register AJAX or admin-post handlers must call current_user_can() and validate nonces before performing privileged operations. Traveler builds prior to 3.2.1 omit one or both of these checks on affected handlers.
Attack Vector
An attacker authenticates to a target WordPress site using any low-privilege account, including self-registered subscribers where open registration is enabled. The attacker then issues HTTP requests directly to the vulnerable theme endpoints. Because no role check is enforced, the server processes the request and executes the underlying action, which can modify booking content or exhaust resources tied to availability.
No verified public exploit code is available. Technical details are documented in the Patchstack WordPress Vulnerability Report.
Detection Methods for CVE-2025-26956
Indicators of Compromise
- Unexpected POST requests to admin-ajax.php or theme-specific endpoints originating from low-privilege accounts
- Unauthorized modifications to booking records, tour listings, or reservation status fields managed by the Traveler theme
- Spikes in failed or anomalous requests targeting Traveler action parameters from a single authenticated session
Detection Strategies
- Inventory WordPress sites and confirm the installed Traveler theme version is 3.2.1 or later
- Review web server access logs for authenticated requests to Traveler handlers that should be restricted to administrators or editors
- Correlate WordPress audit logs with HTTP request logs to surface privilege mismatches between the acting user role and the action invoked
Monitoring Recommendations
- Forward WordPress, web server, and WAF logs to a centralized analytics platform and alert on theme endpoint usage by non-admin roles
- Monitor user registration trends to detect bursts of new subscriber accounts preceding suspicious theme requests
- Track changes to booking, reservation, and configuration tables in the WordPress database for unauthorized writes
How to Mitigate CVE-2025-26956
Immediate Actions Required
- Upgrade the Traveler theme to version 3.2.1 or later on every affected WordPress site
- Disable open user registration or restrict the default role to the minimum required until patching is complete
- Audit existing low-privilege accounts and remove any unrecognized or dormant users
Patch Information
The vendor fix is delivered in Traveler version 3.2.1. The patched release adds the missing authorization checks on the affected handlers. Refer to the Patchstack WordPress Vulnerability Report for advisory details and confirm the active theme version in wp-content/themes/traveler/style.css.
Workarounds
- Deploy a Web Application Firewall rule that blocks unauthenticated and subscriber-level requests to the vulnerable Traveler endpoints
- Temporarily switch to a default WordPress theme on non-production sites that cannot be patched immediately
- Enforce strong password policies and multi-factor authentication on all WordPress accounts to reduce the pool of usable low-privilege credentials
# Verify installed Traveler theme version on a WordPress host
grep -i "^Version" wp-content/themes/traveler/style.css
# Update via WP-CLI once the patched release is available in your source
wp theme update traveler --version=3.2.1
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
