CVE-2025-53588: UPC/EAN Barcode Generator Path Traversal

CVE-2025-53588 Overview

CVE-2025-53588 is a path traversal vulnerability in the UPC/EAN/GTIN Code Generator WordPress plugin (upc-ean-barcode-generator) developed by Dmitry V. of UKR Solution. The flaw allows an authenticated attacker to traverse outside the plugin's intended directory and delete arbitrary files on the host. According to the Patchstack advisory, exploitation results in arbitrary file deletion, which can disrupt site availability. The vulnerability affects all plugin versions up to and including 2.0.2. It is classified under [CWE-22] Improper Limitation of a Pathname to a Restricted Directory.

Critical Impact
Authenticated attackers with low privileges can delete arbitrary files on the WordPress server, leading to site disruption and potential takeover when critical files such as wp-config.php are removed.

Affected Products

UPC/EAN/GTIN Code Generator WordPress plugin (upc-ean-barcode-generator) versions through 2.0.2
WordPress installations running the affected plugin
Sites maintained by Dmitry V. (UKR Solution) using this barcode generator extension

Discovery Timeline

2025-08-28 - CVE-2025-53588 published to the National Vulnerability Database
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-53588

Vulnerability Analysis

The UPC/EAN/GTIN Code Generator plugin fails to properly validate file path input supplied to a file-handling routine. An authenticated user can supply traversal sequences such as ../ to escape the plugin's working directory and reference arbitrary locations on the file system. The plugin then performs a delete operation against the attacker-controlled path. Because WordPress executes plugin code with the privileges of the web server process, the operation can remove any file that the web server user can access.

File deletion in a WordPress context produces high-impact outcomes. Removing wp-config.php forces the site into the installation wizard, which an attacker can complete to attach a database under their control. This pathway converts an arbitrary file deletion primitive into a full site takeover.

Root Cause

The root cause is missing canonicalization and allowlisting of the user-supplied filename parameter passed to the deletion function. The plugin trusts input from an authenticated session without stripping directory traversal characters or confirming that the resolved path stays within the plugin's data directory.

Attack Vector

The attack vector is network-based and requires low-level authenticated access to the WordPress site. The attacker sends a crafted HTTP request to the vulnerable plugin endpoint with a filename parameter containing path traversal sequences. The plugin resolves the path and deletes the referenced file. The scope changes because the impact extends beyond the plugin to the broader WordPress installation and underlying file system.

No public proof-of-concept exploit has been released. Technical details are documented in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-53588

Indicators of Compromise

HTTP requests to plugin endpoints under /wp-content/plugins/upc-ean-barcode-generator/ containing ../ or URL-encoded traversal sequences such as %2e%2e%2f
Unexpected deletion of files outside the plugin directory, particularly wp-config.php, .htaccess, or theme and core files
Sudden appearance of the WordPress installation wizard on a previously configured site
Web server access logs showing POST or GET requests to the plugin from low-privilege user sessions immediately preceding file system anomalies

Detection Strategies

Inspect WordPress request logs for parameters containing directory traversal patterns directed at the upc-ean-barcode-generator plugin
Deploy file integrity monitoring on the WordPress document root to flag deletions of core files
Correlate authenticated session activity from non-administrator accounts with subsequent file system modifications
Review web application firewall logs for blocked traversal payloads targeting plugin URIs

Monitoring Recommendations

Enable real-time alerting on the absence or modification of wp-config.php and .htaccess
Monitor for HTTP responses indicating successful file operations triggered by low-privilege accounts
Track plugin version inventory across WordPress sites to identify hosts still running version 2.0.2 or earlier

How to Mitigate CVE-2025-53588

Immediate Actions Required

Update the UPC/EAN/GTIN Code Generator plugin to a version newer than 2.0.2 once the vendor releases a patched build
Deactivate and remove the plugin from any WordPress site where an update is not yet available
Audit user accounts and revoke unnecessary subscriber or contributor-level access that could be used to authenticate against the vulnerable endpoint
Restore deleted files from backups and verify the integrity of WordPress core files

Patch Information

Review the Patchstack Vulnerability Report for the latest remediation guidance. The advisory indicates the issue affects versions up to and including 2.0.2. Site administrators should consult the plugin's WordPress repository page for any updated release addressing this vulnerability.

Workarounds

Disable the plugin until a fixed version is available and confirmed
Apply web application firewall rules to block requests containing ../ or encoded traversal sequences targeting /wp-content/plugins/upc-ean-barcode-generator/
Restrict file system permissions so the web server user cannot delete WordPress core configuration files
Limit access to the plugin's endpoints by IP address or authenticated role where business requirements allow

bash

# Example ModSecurity rule to block path traversal targeting the vulnerable plugin
SecRule REQUEST_URI "@contains /wp-content/plugins/upc-ean-barcode-generator/" \
    "chain,id:1005301,phase:2,deny,status:403,msg:'CVE-2025-53588 path traversal attempt'"
    SecRule ARGS "@rx (\.\./|%2e%2e%2f|%2e%2e/)" "t:none,t:urlDecodeUni"