CVE-2025-28867 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the stesvis Frontpage category filter plugin, affecting all versions up to and including 1.0.2. CSRF vulnerabilities occur when a web application does not adequately verify that requests modifying state originate from legitimate users. In this case, the Frontpage category filter component fails to implement proper anti-CSRF tokens or equivalent protections, allowing attackers to craft malicious web pages that, when visited by authenticated users, cause unintended changes to the category filter settings. This can lead to unauthorized modifications of content filtering on the front page, potentially disrupting user experience or content presentation. The vulnerability does not appear to allow privilege escalation or remote code execution but compromises the integrity of the affected web application’s configuration. No CVSS score has been assigned yet, and no public exploits are known. The affected product is a niche plugin, likely used in specific content management systems or websites that rely on stesvis components. The vulnerability was published on March 11, 2025, with no patches currently available, emphasizing the need for defensive measures until an official fix is released.

The primary impact of this CSRF vulnerability is on the integrity and availability of the affected web application’s frontpage category filter settings. Attackers can manipulate filter configurations without authorization, potentially causing incorrect content to be displayed or filtering rules to be bypassed. This may degrade user experience, disrupt business operations relying on accurate content presentation, or be leveraged as part of a broader attack chain to confuse or mislead users. While confidentiality is not directly impacted, the unauthorized changes could facilitate further exploitation or social engineering attacks. Organizations using this plugin face risks of reputational damage and operational disruption. Since exploitation requires an authenticated user to visit a malicious site, the attack surface is limited but still significant in environments with many authenticated users. The absence of known exploits reduces immediate risk, but the vulnerability remains a concern until patched.

Until an official patch is released, organizations should implement specific mitigations to reduce risk. These include: 1) Employing web application firewalls (WAFs) to detect and block suspicious CSRF attack patterns targeting the category filter endpoints. 2) Enforcing strict same-site cookie attributes (SameSite=Lax or Strict) to limit cross-origin request capabilities. 3) Educating users to avoid clicking on untrusted links or visiting suspicious websites while authenticated. 4) Reviewing and restricting user permissions to minimize the number of users with rights to modify frontpage category filters. 5) Monitoring web server logs for unusual POST requests or changes to filter settings. 6) If feasible, temporarily disabling or removing the vulnerable plugin until a patch is available. 7) Following vendor channels closely for updates or patches and applying them promptly once released. These targeted mitigations go beyond generic advice by focusing on the specific attack vector and product context.