CVE-2025-47543: Themetechmount Truebooker CSRF Vulnerability

CVE-2025-47543 Overview

CVE-2025-47543 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the themetechmount TrueBooker WordPress plugin (truebooker-appointment-booking). The flaw impacts all versions up to and including 1.0.7. An attacker can trick an authenticated user into submitting a forged request that performs unintended actions within the plugin. Exploitation requires user interaction, typically luring a victim to a malicious page while authenticated to the target WordPress site. The issue is tracked under CWE-352 and stems from missing or insufficient anti-CSRF token validation on plugin request handlers.

Critical Impact
Successful exploitation allows attackers to perform limited state-changing actions within the TrueBooker appointment booking plugin on behalf of an authenticated victim.

Affected Products

themetechmount TrueBooker (truebooker-appointment-booking) WordPress plugin
All versions from initial release through 1.0.7
WordPress sites running the vulnerable plugin

Discovery Timeline

2025-05-07 - CVE-2025-47543 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47543

Vulnerability Analysis

The vulnerability resides in the TrueBooker appointment booking plugin's request handling logic. The plugin fails to validate anti-CSRF tokens (WordPress nonces) on one or more state-changing endpoints. As a result, a remote attacker can craft an HTML page or link that, when visited by an authenticated WordPress user, causes the browser to submit a request to the target site using the victim's active session. The request executes with the victim's privileges. According to the associated CVSS metrics, the vulnerability affects integrity at a limited scope, with no direct impact to confidentiality or availability. See the Patchstack Vulnerability Report for detailed technical analysis.

Root Cause

The root cause is missing or improperly implemented CSRF protection on plugin actions. WordPress provides nonce mechanisms through wp_nonce_field(), wp_verify_nonce(), and check_admin_referer(), but the TrueBooker plugin does not consistently apply these checks on sensitive request handlers up through version 1.0.7. Without a valid nonce verification, the server cannot distinguish between legitimate user-initiated requests and attacker-forged cross-origin requests.

Attack Vector

The attack requires an authenticated victim to interact with attacker-controlled content, such as clicking a link or visiting a page containing a hidden form or image tag targeting the vulnerable endpoint. The attacker does not need credentials to the target site. The victim's browser automatically attaches session cookies, and the vulnerable endpoint processes the forged request. Because no code examples are provided by the upstream advisory, refer to the vendor and Patchstack references for endpoint specifics.

Detection Methods for CVE-2025-47543

Indicators of Compromise

Unexpected changes to TrueBooker appointment records, settings, or configurations initiated from unusual Referer headers.
HTTP POST or GET requests to plugin endpoints lacking a valid WordPress _wpnonce parameter.
Requests to plugin admin actions originating from external domains rather than the WordPress admin interface.

Detection Strategies

Inspect WordPress access logs for requests targeting truebooker-appointment-booking endpoints with cross-origin Referer headers.
Enable WordPress audit logging plugins to track plugin configuration changes and correlate with user session activity.
Alert on POST requests to plugin action handlers missing expected nonce parameters.

Monitoring Recommendations

Monitor the WordPress plugin directory for the presence of truebooker-appointment-booking at version 1.0.7 or earlier.
Track outbound requests from user browsers that reference the WordPress admin domain following visits to unknown external sites.
Review web application firewall (WAF) logs for blocked or anomalous CSRF-style patterns against the plugin.

How to Mitigate CVE-2025-47543

Immediate Actions Required

Identify WordPress sites running the TrueBooker plugin and confirm the installed version through the WordPress admin plugins page.
Restrict administrative access to the WordPress backend and require re-authentication for privileged actions.
Advise privileged users to log out of WordPress when not actively administering the site to reduce session exposure.

Patch Information

At the time of publication, no fixed version is listed in the NVD entry beyond noting that versions up to and including 1.0.7 are affected. Administrators should consult the Patchstack Vulnerability Report and the themetechmount vendor page for updates and apply the patched release as soon as it becomes available.

Workarounds

Deactivate and remove the TrueBooker plugin until a patched version is released if the plugin is not business-critical.
Deploy a web application firewall rule to enforce Referer and Origin header validation for requests targeting truebooker-appointment-booking endpoints.
Require multi-factor authentication for WordPress administrator accounts to limit the impact of session-based attacks.

bash

# Example WAF rule concept: block cross-origin POST requests to the plugin
# Reject requests where Origin/Referer does not match the site's own host
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1004752543,msg:'CVE-2025-47543 CSRF block'"
  SecRule ARGS:action "@rx truebooker" "chain"
  SecRule REQUEST_HEADERS:Referer "!@beginsWith https://your-site.example/"