CVE-2025-58642: Day & Ross LTL Freight Plugin RCE Flaw

CVE-2025-58642 Overview

CVE-2025-58642 is a PHP Object Injection vulnerability in the enituretechnology LTL Freight Quotes – Day & Ross Edition plugin for WordPress. The flaw stems from deserialization of untrusted data [CWE-502] and affects all versions up to and including 2.1.11. An authenticated attacker with high privileges can submit crafted serialized payloads to trigger object injection in the plugin's processing logic.

Successful exploitation can compromise confidentiality, integrity, and availability of the affected WordPress installation. The vulnerability is tracked by Patchstack and published in NVD on September 3, 2025.

Critical Impact
Authenticated object injection enabling arbitrary code execution paths through unsafe PHP deserialization, leading to full site compromise when exploitable gadget chains are present.

Affected Products

LTL Freight Quotes – Day & Ross Edition WordPress plugin (ltl-freight-quotes-day-ross-edition)
All versions from initial release through 2.1.11
WordPress sites running the enituretechnology plugin

Discovery Timeline

2025-09-03 - CVE-2025-58642 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-58642

Vulnerability Analysis

The plugin deserializes attacker-controlled input using PHP's unserialize() function without validating its source or contents. PHP object injection occurs when untrusted serialized strings are passed into deserialization routines, causing the engine to instantiate arbitrary classes already loaded by WordPress, the theme, or other plugins.

When these instantiated objects implement PHP magic methods such as __wakeup, __destruct, or __toString, attackers can chain method calls into so-called "POP chains." These chains can produce arbitrary file writes, file deletion, SQL injection, or remote code execution depending on available gadgets in the runtime environment.

The attack requires network access and authenticated high-privilege context, but does not require user interaction. Once triggered, the impact extends to the entire WordPress site and underlying PHP process.

Root Cause

The root cause is unsafe use of unserialize() against input that crosses a trust boundary [CWE-502]. The plugin fails to validate, sign, or use safe alternatives such as json_decode() for structured data. Any serialized object payload reaching the vulnerable sink is hydrated into a live PHP object.

Attack Vector

An authenticated attacker submits a serialized PHP object string to a plugin endpoint that handles freight quote data. The plugin invokes unserialize() on the input, triggering magic methods on any classes available in the WordPress runtime. Gadget chains from WordPress core, popular plugins, or Composer dependencies can be combined to achieve file write or code execution.

The vulnerability requires no user interaction and operates over the network through standard HTTP requests to the WordPress admin or AJAX surface. See the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-58642

Indicators of Compromise

HTTP requests to plugin endpoints containing serialized PHP object markers such as O:, a:, or s: patterns in POST bodies or query strings
Unexpected creation or modification of PHP files under wp-content/uploads/ or plugin directories
New administrator accounts, modified wp_options rows, or unexpected scheduled tasks in wp_cron
Web server processes spawning shell commands or outbound network connections to unknown hosts

Detection Strategies

Inspect web access logs for requests targeting ltl-freight-quotes-day-ross-edition endpoints with payloads matching PHP serialization syntax
Deploy web application firewall rules that flag serialized object patterns in request parameters
Monitor PHP error logs for __wakeup, __destruct, or class instantiation warnings during plugin requests
Correlate authenticated administrative sessions with anomalous file system writes on the web server

Monitoring Recommendations

Enable file integrity monitoring across the WordPress installation, especially wp-content/plugins/ and wp-content/uploads/
Audit privileged WordPress user activity and review accounts that retain manage_options capability
Capture and retain HTTP request bodies for plugin endpoints to support forensic review

How to Mitigate CVE-2025-58642

Immediate Actions Required

Identify any WordPress instance running LTL Freight Quotes – Day & Ross Edition version 2.1.11 or earlier
Disable or remove the plugin until a vendor patch is verified and applied
Rotate credentials for all administrative WordPress accounts and review recent admin activity
Audit the file system for webshells or unauthorized PHP files introduced after the plugin was installed

Patch Information

As of the NVD entry, no fixed version is published in the available references. Monitor the Patchstack Vulnerability Report and the vendor's plugin page for updates beyond version 2.1.11. Apply the patched release immediately once available.

Workarounds

Remove the ltl-freight-quotes-day-ross-edition plugin from production sites where freight quoting is non-essential
Restrict access to WordPress admin and AJAX endpoints using IP allowlists or VPN-only access
Deploy WAF rules that block request parameters containing PHP serialized object signatures
Apply least privilege to WordPress roles to reduce the population of accounts that meet the high-privilege precondition

bash

# Example WAF rule pattern (ModSecurity) to block serialized PHP object payloads
SecRule ARGS "@rx (?:^|[=&])(?:O|a|s):\d+:" \
  "id:1058642,phase:2,deny,status:403,\
  msg:'Possible PHP object injection payload (CVE-2025-58642)'"