CVE-2025-53581 is a medium severity vulnerability classified as CWE-79, which corresponds to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This vulnerability affects the product RSS Feed Pro developed by artiosmedia, specifically versions up to and including 1.1.8. The flaw allows an attacker to inject malicious scripts that are stored persistently (Stored XSS) within the application. When a user accesses a web page generated by RSS Feed Pro that includes the malicious input, the script executes in the context of the victim's browser. This can lead to unauthorized actions such as session hijacking, defacement, or redirection to malicious sites. The CVSS v3.1 base score is 5.9, indicating a medium severity level. The vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L) reveals that the attack can be performed remotely over the network with low attack complexity, but requires high privileges and user interaction. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component. The impact includes low confidentiality, integrity, and availability impacts, but the stored nature of the XSS increases the risk of persistent exploitation. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was reserved in early July 2025 and published in mid-August 2025, indicating recent discovery. Stored XSS vulnerabilities are particularly dangerous because they can affect multiple users and persist until remediated, making them a significant threat vector in web applications that generate dynamic content from user input without proper sanitization or encoding.

For European organizations using artiosmedia RSS Feed Pro, this vulnerability poses a risk of persistent cross-site scripting attacks that can compromise user sessions, steal sensitive information, or perform unauthorized actions on behalf of legitimate users. Given the requirement for high privileges to exploit, internal users or administrators with elevated access could be targeted or leveraged by attackers to inject malicious scripts. The impact on confidentiality, integrity, and availability is low to medium but can escalate if combined with other vulnerabilities or social engineering tactics. Organizations relying on RSS Feed Pro for content aggregation or distribution may face reputational damage, data leakage, or disruption of services. Additionally, compliance with GDPR and other data protection regulations in Europe could be jeopardized if personal data is exposed through exploitation of this vulnerability. The lack of current known exploits reduces immediate risk, but the stored XSS nature means that once exploited, the attack can affect multiple users over time, increasing the potential damage.

European organizations should immediately audit their use of artiosmedia RSS Feed Pro and identify if they are running affected versions (up to 1.1.8). Until an official patch is released, organizations should implement strict input validation and output encoding on all user-supplied data within the RSS Feed Pro environment to prevent injection of malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Limit administrative privileges to trusted personnel and enforce multi-factor authentication to reduce the risk of privilege abuse. Regularly monitor logs and user activity for signs of anomalous behavior indicative of XSS exploitation attempts. Consider deploying web application firewalls (WAFs) with rules targeting XSS payloads specific to RSS Feed Pro. Educate users about the risks of clicking on suspicious links or interacting with untrusted content. Once a patch becomes available from artiosmedia, prioritize its deployment in all affected environments. Finally, conduct security testing and code reviews focusing on input sanitization and output encoding to prevent similar vulnerabilities.