Platform
wordpress
Component
fast-fancy-filter-3f
Fixed in
1.2.3
1.2.3
CVE-2026-6396 describes a Cross-Site Request Forgery (CSRF) vulnerability affecting the Fast & Fancy Filter – 3F plugin for WordPress. This flaw allows unauthenticated attackers to manipulate plugin settings and potentially create new content on a WordPress site. The vulnerability impacts versions up to and including 1.2.2, and a fix is available in subsequent releases.
An attacker exploiting this CSRF vulnerability could significantly compromise a WordPress site. By crafting malicious links or embedding them in deceptive content, they can trick a site administrator into unknowingly executing actions that modify plugin filter settings. This could lead to unauthorized changes to website functionality, the creation of malicious filter posts, or even the modification of arbitrary WordPress options. The potential impact extends to data integrity and website availability, as attackers could alter critical configurations to disrupt normal operations. While requiring user interaction (clicking a malicious link), the ease of social engineering makes this a concerning risk, especially for sites with administrative users who frequently click links from untrusted sources.
CVE-2026-6396 was published on 2026-04-21. Currently, there are no known public exploits or active campaigns targeting this specific vulnerability. Its severity is rated as MEDIUM (CVSS 4.3), indicating a moderate risk. The vulnerability is not listed on KEV (Known Exploited Vulnerabilities) as of this writing. Monitor security advisories and threat intelligence feeds for any indications of exploitation.
Exploit Status
EPSS
0.01% (1% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-6396 is to upgrade the Fast & Fancy Filter – 3F plugin to a version that addresses the missing nonce verification. If upgrading immediately is not feasible due to compatibility issues or testing requirements, consider implementing a Web Application Firewall (WAF) rule to block requests to the fffsavesettins AJAX action without a valid nonce. Alternatively, restrict access to the plugin's settings page to authenticated administrators only, limiting the potential attack surface. After upgrading, confirm the fix by attempting to trigger the fffsavesettins action via a crafted request and verifying that the action is rejected due to missing or invalid nonce.
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
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CVE-2026-6396 is a Cross-Site Request Forgery (CSRF) vulnerability in the Fast & Fancy Filter – 3F WordPress plugin, allowing attackers to manipulate plugin settings via forged requests.
You are affected if you are using the Fast & Fancy Filter – 3F plugin in versions 1.2.2 or earlier. Check your plugin version and upgrade if necessary.
Upgrade the Fast & Fancy Filter – 3F plugin to a version that includes the nonce verification fix. Consider a WAF rule as a temporary mitigation if upgrading is delayed.
As of now, there are no known public exploits or active campaigns targeting CVE-2026-6396, but it's crucial to apply the fix proactively.
Refer to the plugin developer's website or the WordPress plugin repository for the latest advisory and update information regarding CVE-2026-6396.
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