CVE-2025-62759 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, found in the Justin Tadlock Series plugin, which is commonly used in WordPress environments for content management. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing an attacker with low privileges (PR:L) to inject malicious scripts that are stored and later executed in the context of other users' browsers. The attack requires user interaction (UI:R), such as clicking a crafted link or visiting a compromised page, to trigger the payload. The vulnerability affects all versions up to 2.0.1, with no specific version exclusions noted. The CVSS v3.1 base score is 6.5, indicating medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), and scope change (S:C), meaning the vulnerability can affect resources beyond the initially compromised component. The impact includes partial loss of confidentiality, integrity, and availability, as malicious scripts can steal session tokens, modify displayed content, or perform actions on behalf of users. No known exploits are currently reported in the wild, and no official patches have been published yet. The vulnerability was reserved in October 2025 and published at the end of 2025, indicating a recent disclosure. Given the plugin's usage in web environments, the threat primarily targets web application users and administrators.

For European organizations, the impact of CVE-2025-62759 can be significant, especially for those relying on the Justin Tadlock Series plugin within their WordPress-based websites or intranet portals. Successful exploitation could lead to session hijacking, unauthorized actions performed on behalf of legitimate users, defacement, or distribution of malware through the compromised web interface. This can result in data breaches, reputational damage, and potential regulatory non-compliance under GDPR due to exposure of personal data. The medium severity score reflects that while the vulnerability is exploitable remotely and with low complexity, it requires some user interaction and privileges, limiting the scope somewhat. However, the scope change indicates that the attacker could affect other components or users beyond the initial target, increasing the risk in multi-user environments. Organizations with public-facing websites or portals that allow user-generated content are particularly vulnerable. The absence of known exploits reduces immediate risk but should not lead to complacency, as attackers may develop exploits once patches are released or if the vulnerability becomes widely known.

1. Immediately audit and restrict user input fields within the Justin Tadlock Series plugin to ensure proper sanitization and encoding, especially for any content that is stored and later rendered on web pages. 2. Implement strict Content Security Policies (CSP) to limit the execution of unauthorized scripts and reduce the impact of any injected malicious code. 3. Limit user privileges to the minimum necessary, preventing low-privilege users from submitting content that could be exploited. 4. Monitor web application logs and user activity for unusual behavior indicative of XSS exploitation attempts. 5. Employ web application firewalls (WAFs) with updated rules to detect and block XSS payloads targeting this plugin. 6. Stay informed about official patches or updates from the vendor and apply them promptly once available. 7. Educate users about the risks of interacting with suspicious links or content to reduce the likelihood of triggering stored XSS payloads. 8. Consider temporary disabling or replacing the affected plugin if feasible until a secure version is released.