CVE-2026-11434: FluentCMS Blocks Plugin blocks cross site scripting
A weakness has been identified in FluentCMS 0.0.5. The impacted element is an unknown function of the file /admin/blocks of the component Blocks Plugin. This manipulation causes cross site scripting. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
FluentCMS Blocks Plugin (FluentCMS 0.0.5)from your environment.Uninstall the FluentCMS Blocks Plugin (remove the /admin/blocks component) if it is not required. Removing the plugin eliminates the vulnerable code path that enables the XSS vulnerability.
- Compensating control
If the plugin cannot be removed immediately, restrict access to the /admin/blocks endpoint and the CMS administrative interface to trusted IP addresses (firewall/ACL). Deploy Web Application Firewall (WAF) rules to block or sanitize requests containing typical XSS payloads targeting /admin/blocks and monitor/block suspicious requests to that path.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-11434?
The severity of CVE-2026-11434 is classified as low with a score of 2.4.
How can I mitigate CVE-2026-11434?
To mitigate CVE-2026-11434, it is recommended to update to a patched version of the FluentCMS Blocks Plugin.
What type of vulnerability is represented by CVE-2026-11434?
CVE-2026-11434 is a cross-site scripting (XSS) vulnerability.
Can CVE-2026-11434 be exploited remotely?
Yes, CVE-2026-11434 can be exploited remotely.
What component of FluentCMS is affected by CVE-2026-11434?
CVE-2026-11434 affects the Blocks Plugin component of FluentCMS.