CVE-2025-49879: Litho WordPress Theme Path Traversal Flaw

CVE-2025-49879 Overview

CVE-2025-49879 is a path traversal vulnerability affecting the themezaa Litho WordPress theme. The flaw allows unauthenticated attackers to traverse outside intended directories and delete arbitrary files on the server. The vulnerability impacts all Litho theme versions from initial release through 3.0. According to the Patchstack advisory, the issue manifests as an arbitrary file deletion vulnerability triggered through improper pathname validation [CWE-22].

Critical Impact
Unauthenticated attackers can delete arbitrary files on the server over the network without user interaction, potentially leading to site compromise or full denial of service.

Affected Products

themezaa Litho WordPress theme — versions up to and including 3.0
WordPress installations using Litho theme as active or installed theme
Sites where Litho theme files are accessible to unauthenticated requests

Discovery Timeline

2025-06-17 - CVE-2025-49879 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-49879

Vulnerability Analysis

The vulnerability is classified as Improper Limitation of a Pathname to a Restricted Directory [CWE-22]. The Litho theme accepts a file path parameter that is not properly sanitized before being used in a file deletion operation. An attacker can supply directory traversal sequences such as ../ to break out of the intended working directory and reference files anywhere the web server process can access.

The attack requires no authentication and no user interaction. The attack vector is network-based and exploitation complexity is low. The scope is changed because the vulnerability impacts resources beyond the vulnerable component itself, including critical WordPress files such as wp-config.php.

Root Cause

The root cause is the absence of canonicalization and allow-list validation on a user-controlled file path parameter consumed by a file deletion routine in the Litho theme. The handler trusts attacker-supplied input and resolves it against the filesystem without confirming the final path remains within an approved directory.

Attack Vector

An attacker sends a crafted HTTP request to the vulnerable endpoint exposed by the Litho theme, supplying a path containing traversal sequences. The handler resolves the path and invokes a deletion function such as unlink() against the resulting target. Deleting wp-config.php forces WordPress into the setup wizard, allowing the attacker to reconfigure the site against an attacker-controlled database and achieve remote code execution.

No verified public exploit code is available. See the Patchstack Vulnerability Analysis for additional technical context.

Detection Methods for CVE-2025-49879

Indicators of Compromise

HTTP requests to Litho theme endpoints containing ../ or URL-encoded variants such as %2e%2e%2f in path parameters
Unexpected deletion of wp-config.php, .htaccess, or core WordPress files on hosts running the Litho theme
WordPress installations unexpectedly displaying the initial setup or installation wizard
Web server access logs showing unauthenticated POST or GET requests to theme PHP files with file or path parameters

Detection Strategies

Inspect web access logs for requests targeting /wp-content/themes/litho/ paths with suspicious path parameters
Deploy web application firewall rules that block directory traversal sequences in query strings and POST bodies
Run file integrity monitoring on the WordPress root and wp-content directories to identify unauthorized deletions

Monitoring Recommendations

Alert on any modification or removal of wp-config.php and other critical WordPress files
Track HTTP response codes from theme endpoints and flag spikes in 200 responses to unauthenticated requests
Forward web server and PHP error logs to a centralized analytics platform for correlation across hosts

How to Mitigate CVE-2025-49879

Immediate Actions Required

Identify all WordPress sites running the Litho theme and confirm the installed version
Take affected sites offline or place them behind maintenance mode until a patched version is available
Back up wp-config.php, the database, and the wp-content directory before applying any changes
Rotate WordPress salts, database credentials, and administrative passwords if compromise is suspected

Patch Information

At the time of NVD publication, no fixed version beyond Litho 3.0 was listed. Monitor the Patchstack Vulnerability Analysis and the vendor's distribution channel for an updated release. Apply the patched version as soon as it becomes available.

Workarounds

Switch to an alternative WordPress theme until a patched Litho release is published
Restrict access to Litho theme PHP endpoints using web server rules or a web application firewall
Apply WAF signatures that block path traversal patterns such as ../, ..\\, and their URL-encoded forms
Run the WordPress process under a least-privilege account that cannot delete files outside wp-content

bash

# Example nginx rule to block traversal sequences targeting the Litho theme
location ~* /wp-content/themes/litho/ {
    if ($args ~* "(\.\./|\.\.%2f|%2e%2e/)") {
        return 403;
    }
    if ($request_uri ~* "(\.\./|\.\.%2f|%2e%2e/)") {
        return 403;
    }
}