CVE-2026-6401 Bottom Bar <= 0.1.7 - Cross-Site Request Forgery to Settings Update
Attackers can trick administrators into updating plugin settings via CSRF due to missing nonce verification in the Bottom Bar WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-6401?
CVE-2026-6401 is a medium-severity vulnerability in svil4ok Bottom Bar, published on 20 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Bottom Bar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 0.1.7. This is due to missing nonce verification on the plugin's settings update forms handled in bottom-bar-admin.php. None of the three settings forms (main settings, sharing services, restore defaults) include a wp_nonce_field(), and the server-side processing code never calls check_admin_referer() or any equivalent nonce validation before processing POST data and calling update_option(). This makes it possible for unauthenticated attackers to trick a logged-in administrator into submitting a crafted request that updates plugin configuration options, such as changing the language, maximum post counts, or enabled sharing services.
Weakness: CWE-352
Which versions are affected by CVE-2026-6401?
How do I fix CVE-2026-6401?
No fix has been published for CVE-2026-6401 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6401 being exploited?
There is no known exploitation of CVE-2026-6401 in the wild and no public exploit code.
Sources
Also known as GHSA-3rp8-xffc-p7wp.