CVE-2026-25469: 
WordPress vulnerability analysis and mitigation

CVE-2026-25469 is a Missing Authorization vulnerability in the ViaBill – WooCommerce WordPress plugin that allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially modifying plugin settings. It affects all versions of the plugin from n/a through 1.1.53. The vulnerability was published on March 25, 2026, with Patchstack credited as the assigner. It carries a CVSS v3.1 base score of 6.5 (Medium) (Feedly, Patchstack).

The root cause is classified as CWE-862 (Missing Authorization), meaning the plugin fails to properly verify whether a requesting user has the necessary permissions before executing sensitive actions. The attack vector is network-based, requires no authentication, no user interaction, and low attack complexity, making it trivially exploitable by any remote attacker. The vulnerability specifically enables exploitation of incorrectly configured access control security levels, likely allowing unauthorized modification of plugin settings or configuration (Feedly).

Successful exploitation can result in unauthorized modification of plugin settings (integrity impact: low) and potential disruption of plugin functionality (availability impact: low), with no direct confidentiality impact. Because the ViaBill plugin handles payment processing within WooCommerce, unauthorized settings changes could interfere with payment flows, redirect transactions, or disrupt checkout functionality for affected e-commerce sites. The scope is unchanged, limiting the blast radius to the affected plugin component (Feedly).

No public proof-of-concept exploit code or evidence of in-the-wild exploitation has been reported for this vulnerability. The EPSS score is approximately 0.017% (0.000170), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and no threat actor attribution has been identified (Feedly).

Users should update the ViaBill – WooCommerce plugin to a version beyond 1.1.53 that addresses this authorization flaw. Until a patched version is available or confirmed, administrators should consider disabling the plugin if it is not actively required, or restrict access to the WordPress admin panel and plugin endpoints via network-level controls (e.g., IP allowlisting). Regularly auditing plugin settings for unauthorized changes is also recommended as a compensating control (Patchstack).