CVE-2026-25419 identifies a missing authorization vulnerability in the flycart UpsellWP WordPress plugin, specifically within the checkout-upsell-and-order-bumps component. UpsellWP is a plugin designed to enhance e-commerce sales by offering upsells and order bumps during the checkout process. The vulnerability arises from incorrectly configured access control security levels, allowing unauthorized users to perform actions that should be restricted. This could include manipulating upsell offers, altering order bumps, or interfering with checkout flows without proper permissions. The affected versions include all releases up to and including 2.2.3. The vulnerability does not require prior authentication, increasing the risk of exploitation. Although no exploits have been reported in the wild, the flaw presents a significant risk because it undermines the integrity of the sales process and could lead to financial losses or customer trust issues. The absence of a CVSS score means severity must be assessed based on impact and exploitability factors. The plugin is widely used in WordPress-based e-commerce sites, making the attack surface considerable. The vulnerability was published on February 19, 2026, with no patches currently linked, indicating that users must monitor vendor updates closely. The issue is categorized under missing authorization, a common and critical security flaw that can lead to privilege escalation or unauthorized data manipulation.

For European organizations, especially those operating e-commerce platforms on WordPress using the UpsellWP plugin, this vulnerability could lead to unauthorized manipulation of checkout upsells and order bumps. This may result in financial losses due to fraudulent transactions or altered sales offers, damage to brand reputation, and potential customer trust erosion. The integrity of the sales process is compromised, which could also affect inventory management and revenue reporting. Since the vulnerability does not require authentication, attackers can exploit it remotely without credentials, increasing the risk of widespread abuse. Organizations handling sensitive customer data or payment information could face regulatory scrutiny under GDPR if the vulnerability leads to data exposure or fraud. The lack of known exploits provides a window for proactive mitigation, but the risk remains significant given the plugin's role in the transaction process.

Organizations should immediately audit their WordPress installations to identify if the UpsellWP plugin is in use and determine the version deployed. Until an official patch is released by flycart, administrators should consider disabling the UpsellWP plugin or restricting access to its functionalities via web application firewalls or access control lists. Review and tighten user roles and permissions related to e-commerce management to minimize exposure. Implement monitoring and logging for unusual activities around checkout upsells and order bumps to detect potential exploitation attempts. Engage with the plugin vendor for updates and apply patches promptly once available. Additionally, consider isolating the e-commerce environment and employing security plugins that can enforce stricter access controls. Educate staff on the risks and ensure incident response plans include scenarios involving plugin vulnerabilities.