CVE-2025-67943 is a reflected Cross-site Scripting (XSS) vulnerability identified in the wphocus My auctions allegro WordPress plugin, versions up to and including 3.6.32. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected and executed in the context of a victim's browser. This reflected XSS does not require authentication or privileges but does require user interaction, typically through clicking a maliciously crafted URL. The CVSS 3.1 base score is 7.1, reflecting a high severity due to network attack vector, low attack complexity, no privileges required, but user interaction needed, and impacts on confidentiality, integrity, and availability with scope changed. The vulnerability can be exploited to steal session cookies, perform actions on behalf of users, deface web content, or redirect users to malicious sites, potentially leading to broader compromise. Although no known exploits are currently reported in the wild, the widespread use of WordPress and the plugin in question increases the risk of exploitation once public details are available. The vulnerability affects the free edition of the plugin, which is commonly used in auction and e-commerce sites built on WordPress, making it a significant concern for organizations relying on this software for online sales and auctions.

For European organizations, this vulnerability poses a significant risk, particularly for those operating e-commerce or auction platforms using the My auctions allegro plugin. Successful exploitation can lead to theft of user credentials and session tokens, enabling unauthorized access to user accounts and potentially administrative functions. This compromises confidentiality and integrity of user data and platform content. Additionally, attackers can manipulate website content or redirect users to malicious sites, damaging brand reputation and customer trust. The availability of the service can also be impacted if attackers use the vulnerability to inject disruptive scripts. Given the plugin’s role in transaction-related activities, financial fraud and data breaches are plausible outcomes. The risk is amplified in sectors with strict data protection regulations such as GDPR, where breaches can lead to significant legal and financial penalties. Organizations with high volumes of European customers or those operating in countries with strong e-commerce markets are particularly vulnerable.

Organizations should monitor for official patches from the wphocus vendor and apply updates to the My auctions allegro plugin immediately upon release. In the interim, implementing strict input validation and output encoding on all user-supplied data can reduce the risk of script injection. Employing a robust Content Security Policy (CSP) can help mitigate the impact of XSS by restricting the execution of unauthorized scripts. Web Application Firewalls (WAFs) configured to detect and block reflected XSS payloads can provide additional protection. Security teams should conduct regular vulnerability assessments and penetration testing focused on XSS vectors. Educating users about the risks of clicking untrusted links can reduce successful exploitation. Finally, monitoring web server and application logs for suspicious activity related to this vulnerability can aid in early detection of attempted attacks.