CVE-2025-62913 identifies a stored cross-site scripting (XSS) vulnerability in the wpopal Opal Service, a web-based product used for content or service management. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows attackers to inject malicious scripts that are stored on the server and executed in the context of other users' browsers. This type of XSS can be exploited by an attacker with limited privileges (PR:L) and requires user interaction (UI:R), such as a victim visiting a crafted page or clicking a link. The vulnerability affects all versions up to and including 1.9.1. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates that the attack can be launched remotely over the network with low attack complexity, requires some privileges, and user interaction, and impacts confidentiality and integrity with a scope change, but does not affect availability. Stored XSS can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim, potentially compromising sensitive information and user trust. Although no known exploits are currently reported in the wild and no patches have been released, the vulnerability poses a moderate risk to organizations relying on this service. The lack of CWE identifiers suggests the vulnerability is straightforward input sanitization failure. The vendor and community should prioritize releasing patches and advisories to mitigate this risk.

For European organizations, this vulnerability can lead to unauthorized disclosure of sensitive information and manipulation of user sessions within affected web applications using wpopal Opal Service. Attackers could leverage stored XSS to execute malicious scripts in the browsers of employees or customers, potentially stealing credentials or performing actions with the victim's privileges. This could undermine trust in affected services and lead to data breaches or compliance violations under GDPR. The medium severity and requirement for user interaction somewhat limit the immediacy of impact, but targeted phishing or social engineering could increase exploitation likelihood. Organizations with public-facing web portals or internal dashboards using Opal Service are at risk. The vulnerability does not affect availability, so denial-of-service is unlikely. However, the compromise of confidentiality and integrity could have reputational and financial consequences, especially in regulated sectors such as finance, healthcare, and government services prevalent in Europe.

European organizations should implement strict input validation and output encoding on all user-supplied data within the Opal Service environment to prevent script injection. Employ Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers. Limit user privileges to the minimum necessary to reduce the impact of exploitation. Monitor web application logs for suspicious input patterns indicative of XSS attempts. Educate users about the risks of interacting with untrusted links or content. Since no patches are currently available, consider isolating or restricting access to vulnerable instances of Opal Service until updates are released. Engage with the vendor for timely patch deployment and subscribe to security advisories. Conduct regular security assessments and penetration testing focused on XSS vulnerabilities. Implement web application firewalls (WAFs) with rules to detect and block XSS payloads targeting Opal Service endpoints.