CVE-2025-8097 is a security vulnerability identified in the WoodMart WordPress theme developed by xTemos, affecting all versions up to and including 8.2.6. The root cause is improper input validation (CWE-20) in the function woodmart_update_cart_item, specifically concerning the 'qty' parameter that controls the quantity of items added to the shopping cart. The vulnerability allows unauthenticated attackers to manipulate this quantity parameter by submitting fractional values such as 0.00001. Due to insufficient validation and rounding logic in the cart total calculation, these fractional quantities can cause the total price to be rounded down to zero, effectively bypassing payment requirements. This enables attackers to acquire virtual or downloadable products without paying, resulting in unauthorized acquisition of goods. The vulnerability does not require authentication or user interaction, and the attack vector is network accessible (via the web interface). The CVSS 3.1 base score is 5.3 (medium severity), reflecting the lack of confidentiality impact but presence of integrity impact (unauthorized modification of purchase quantities) and no availability impact. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability is significant because it undermines the fundamental e-commerce transaction integrity, potentially leading to financial losses for merchants using the WoodMart theme for their WordPress stores, especially those selling virtual or downloadable products where delivery is automated and immediate.

For European organizations operating e-commerce websites using the WoodMart WordPress theme, this vulnerability poses a direct financial risk. Attackers can exploit the flaw to obtain products without payment, leading to revenue loss and potential inventory discrepancies. Since the exploit requires no authentication, it can be automated and scaled, increasing the risk of widespread abuse. The impact is particularly severe for businesses selling virtual or downloadable goods (e.g., software licenses, digital media, e-books) where product delivery is instant and does not require physical shipping, making fraud detection more difficult. Additionally, repeated exploitation could damage the reputation of affected merchants and erode customer trust. From a regulatory perspective, European organizations must consider the implications under GDPR if exploitation leads to indirect data exposure or if fraudulent transactions trigger investigations. The vulnerability also increases the risk of fraudulent chargebacks and complicates financial reconciliation processes. While the vulnerability does not directly impact confidentiality or availability, the integrity breach in transaction processing is critical for business operations and financial health.

1. Immediate mitigation involves implementing server-side input validation to strictly enforce that the 'qty' parameter accepts only positive integers, disallowing fractional or zero values. This can be done by sanitizing and validating input before processing cart updates. 2. Merchants should monitor transaction logs for anomalous cart quantities and suspicious zero-value orders, enabling early detection of exploitation attempts. 3. Employ web application firewalls (WAFs) with custom rules to detect and block requests containing fractional 'qty' parameters targeting the WoodMart cart update endpoints. 4. Until an official patch is released, consider temporarily disabling or restricting the affected cart update functionality or switching to alternative themes or e-commerce plugins that do not exhibit this vulnerability. 5. Engage with the theme vendor (xTemos) to obtain timely patches and updates. 6. Implement additional fraud detection mechanisms that flag orders with unusual quantities or pricing anomalies for manual review. 7. Educate staff responsible for e-commerce operations to recognize signs of exploitation and respond promptly. 8. Regularly update WordPress core, themes, and plugins to minimize exposure to known vulnerabilities.