CVE-2025-58598: Klarna WooCommerce Information Disclosure

CVE-2025-58598 Overview

CVE-2025-58598 is a sensitive information disclosure vulnerability in the Klarna Order Management for WooCommerce WordPress plugin. The flaw affects all versions up to and including 1.9.8. The plugin inserts sensitive information into debugging code, allowing an attacker with high privileges to retrieve embedded sensitive data over the network. The issue is classified under CWE-215: Insertion of Sensitive Information Into Debugging Code.

Critical Impact
Attackers with elevated privileges can retrieve embedded sensitive data from debug output, potentially exposing credentials, API tokens, or transaction details tied to the Klarna payment integration.

Affected Products

Klarna Order Management for WooCommerce plugin (klarna-order-management-for-woocommerce)
All versions from n/a through <= 1.9.8
WordPress sites using the affected plugin with WooCommerce

Discovery Timeline

2025-09-03 - CVE-2025-58598 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-58598

Vulnerability Analysis

The vulnerability stems from the plugin embedding sensitive information inside debugging code paths. When debug output is generated or accessible, an authenticated actor can read data that should never leave a controlled logging boundary. This is a classic [CWE-215] pattern where diagnostic aids intended for developers leak into runtime-accessible surfaces.

The attack requires network access to the WordPress site and elevated privileges, which limits the attacker population. However, the confidentiality impact is high because leaked material can include payment integration secrets, order metadata, or API credentials used to communicate with Klarna services.

Root Cause

The plugin writes sensitive values into debug messages without redaction. Debug artifacts are then retrievable by users who reach the debug interface or log storage. The design assumes debug output is trusted, which is incorrect once high-privilege accounts or log-viewing surfaces become part of the reachable attack surface.

Attack Vector

An attacker authenticated with high privileges on the WordPress instance interacts with plugin functionality that emits debug information. The attacker then reads the debug output to extract embedded secrets. No user interaction is required. Refer to the Patchstack Vulnerability Report for advisory detail.

// No verified public exploit code is available for CVE-2025-58598.
// Refer to the Patchstack advisory linked above for technical detail.

Detection Methods for CVE-2025-58598

Indicators of Compromise

Presence of Klarna Order Management for WooCommerce plugin at version 1.9.8 or earlier on WordPress hosts
Unexpected read access to WordPress debug logs (wp-content/debug.log) or plugin-specific log files
Authenticated administrative sessions accessing plugin debug endpoints outside normal maintenance windows

Detection Strategies

Inventory WordPress installations and flag any instance running klarna-order-management-for-woocommerce at or below 1.9.8
Audit web server logs for requests to plugin debug or diagnostic endpoints by administrator accounts
Monitor for outbound egress of Klarna API credentials or tokens appearing in logs, backups, or exports

Monitoring Recommendations

Enable file integrity monitoring on wp-content/plugins/klarna-order-management-for-woocommerce/ and any debug log paths
Alert on new or elevated WordPress administrator account creation followed by plugin configuration access
Correlate WooCommerce order events with anomalous administrator activity to identify credential misuse

How to Mitigate CVE-2025-58598

Immediate Actions Required

Update the Klarna Order Management for WooCommerce plugin to a version above 1.9.8 once released by the vendor
Rotate Klarna API credentials, WooCommerce keys, and any secrets that may have been exposed through debug output
Restrict administrator account access and enforce multi-factor authentication on all high-privilege WordPress accounts

Patch Information

Consult the Patchstack advisory for CVE-2025-58598 for the current fixed version. Apply the patched release through the WordPress plugin manager or via WP-CLI as soon as the vendor publishes an updated build.

Workarounds

Disable WordPress debug mode by setting WP_DEBUG and WP_DEBUG_LOG to false in wp-config.php
Restrict access to plugin debug or diagnostic endpoints using web server access controls or a web application firewall rule
Remove or rotate log files that may contain sensitive Klarna integration data

bash

# Disable WordPress debug output in wp-config.php
define( 'WP_DEBUG', false );
define( 'WP_DEBUG_LOG', false );
define( 'WP_DEBUG_DISPLAY', false );

# Update the plugin once a fixed version is available
wp plugin update klarna-order-management-for-woocommerce