CVE-2026-109701 in PAYCOMET Plugin
Summary
by MITRE • 10/17/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in PAYCOMET PAYCOMET for WooCommerce paytpv-for-woocommerce allows Reflected XSS.This issue affects PAYCOMET for WooCommerce: from n/a through 5.45.
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Analysis
by VulDB Data Team • 10/17/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests as a Reflected XSS within the PAYCOMET for WooCommerce plugin, designated by the file path paytpv-for-woocommerce. This type of vulnerability occurs when an application receives data from users via HTTP requests and immediately includes that unvalidated input in its response without proper sanitization or encoding. In the context of web applications like WordPress plugins handling payment gateways, such flaws are particularly critical because they can be exploited to execute malicious scripts in the victim's browser session. The vulnerability affects versions of PAYCOMET for WooCommerce ranging from no lower bound specified up through version 5.45, indicating a broad scope of potentially impacted installations that have not applied subsequent patches or updates.
From a technical perspective, reflected XSS vulnerabilities typically arise when user-supplied input is echoed back into the HTML output without being properly escaped. An attacker can craft a malicious URL containing script code as part of the query parameters or form data. When an unsuspecting user clicks this link while logged into their WordPress administration panel or storefront, the browser executes the injected JavaScript in the context of the vulnerable site. This allows the attacker to bypass same-origin policy restrictions and access sensitive information such as session cookies, authentication tokens, or personally identifiable information stored locally by the application. The impact is severe because it compromises the integrity and confidentiality of the user's interaction with the payment processing system, potentially leading to account takeover or unauthorized transactions if combined with other social engineering tactics.
The operational impact of this vulnerability extends beyond simple script execution. Attackers can leverage reflected XSS to perform actions on behalf of authenticated users, such as changing email addresses, modifying payment methods, or initiating fraudulent refunds. Since PAYCOMET handles financial data and transaction processing, the compromise of user sessions could lead directly to financial loss for merchants and customers alike. Furthermore, attackers may use this vector to deface websites by injecting malicious content into public-facing pages, damaging brand reputation and trust. The lack of input validation means that even simple script tags or event handlers can be executed, making exploitation straightforward for individuals with basic knowledge of web security principles. This underscores the critical need for rigorous input handling in all components interacting with user data, especially those involved in financial transactions.
To mitigate this vulnerability, immediate action is required to update the PAYCOMET for WooCommerce plugin to a version newer than 5.45 where the issue has been resolved. Developers and administrators should ensure that all instances of the plugin are patched across their WordPress environments. Beyond updating software, implementing robust input validation and output encoding strategies is essential. All user-supplied data must be validated against expected formats and encoded appropriately before being rendered in HTML contexts. Utilizing Content Security Policy headers can also help mitigate the impact of any remaining XSS vulnerabilities by restricting the sources from which scripts can be loaded or executed. Regular security audits and penetration testing should be conducted to identify similar flaws in other plugins or custom code within the WordPress ecosystem, ensuring a comprehensive defense against input-based attacks.
This vulnerability aligns with CWE-79, Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), which categorizes weaknesses where web pages are generated using user-controlled data without proper sanitization. In terms of attack tactics, this falls under the MITRE ATT&CK technique T1059, Command and Scripting Interpreter, specifically within the context of browser-based execution via DOM or reflected inputs. Understanding these classifications helps security professionals prioritize remediation efforts based on standardized frameworks that map technical flaws to broader threat landscapes. By addressing both the specific code defect and implementing broader defensive measures like CSP and input validation, organizations can significantly reduce their exposure to cross-site scripting attacks and maintain the integrity of their e-commerce infrastructure.