Attack Vectors
CVE-2025-13048 affects the WordPress plugin StatCounter – Free Real Time Visitor Stats (slug: official-statcounter-plugin-for-wordpress) in versions up to and including 2.1.0. It is a Medium severity issue (CVSS 6.4).
The attack requires an authenticated WordPress user with at least Contributor permissions. An attacker can place malicious script into the user’s Nickname field. Because the plugin does not adequately sanitize and safely display that field, the script can be stored and then executed later when a page containing the injected content is viewed.
This means the risk is most relevant to organizations that allow multiple internal users, agencies, or partners to access the WordPress dashboard with Contributor access or higher—especially where user management and content workflows are distributed across teams.
Security Weakness
This vulnerability is a Stored Cross-Site Scripting (Stored XSS) issue caused by insufficient input sanitization and output escaping related to the WordPress user Nickname value. In practical terms, untrusted content can be saved and later rendered to other users in a way that allows it to run as a script in their browser.
Because Stored XSS executes in a victim’s browser when they view affected pages, it can impact higher-privileged users (for example, administrators or editors) who may simply be browsing the site or reviewing content.
Technical or Business Impacts
For leadership and compliance stakeholders, the business risk is that this type of vulnerability can be used to interfere with user sessions and on-site activity in ways that undermine trust and operational integrity. Even at Medium severity, it can become a meaningful risk when combined with common realities like shared access, third-party contributors, or limited oversight of user accounts.
Potential impacts include unauthorized actions performed through an affected user’s active session, disruption to marketing operations (site content changes, campaign pages altered, forms affected), reputational damage if visitors encounter suspicious behavior, and added compliance exposure if the incident triggers investigation, disclosure obligations, or audit findings. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) indicates network reachability, low attack complexity, and cross-site impact scope with confidentiality and integrity effects.
Remediation: Update StatCounter – Free Real Time Visitor Stats to version 2.1.1 or a newer patched version. For affected organizations, also review accounts with Contributor access and above, and confirm that user profile fields (including Nickname) are governed by your access and change-control processes.
Similar Attacks
Stored XSS has been widely abused across web platforms and can lead to real-world business disruption. Relevant, real examples include:
CVE-2018-6389 (WordPress-related issue)
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