CVE-2026-78273
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
The Fluent Boards Pro plugin version 2.0.11 and earlier has a Subscriber Cross Site Scripting (XSS) vulnerability. A user with the subscriber role can inject a malicious script that executes in other users' browsers.
Risk Assessment
XSS attack can enable session theft, account takeover, or spreading malicious code within the application.
Recommendation
Update Fluent Boards Pro to the latest patched version and apply anti-XSS filters in server configuration.
Other vulnerabilities in Fluent Boards Pro
See all- CVE-2026-78278Medium
IDOR vulnerability in Fluent Boards Pro versions up to 2.0.11, affecting subscriber role users. Allows access to unauthorized objects.
- CVE-2026-78274Critical
The Fluent Boards Pro plugin versions up to 2.0.11 contain an arbitrary file upload vulnerability exploitable by users with the editor role. This can lead to execution of malicious code on the server.
- CVE-2026-78276High
Editor PHP Object Injection vulnerability in Fluent Boards Pro versions up to 2.0.11. A user with editor role can inject malicious PHP objects, potentially leading to remote code execution.
- CVE-2026-78275Medium
The Fluent Boards Pro plugin version 2.0.11 and earlier has an Editor Arbitrary File Deletion vulnerability. An editor can delete arbitrary files on the server, which can lead to serious damage.
- CVE-2026-78466Medium
The Fluent Boards Pro plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.11 due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to perform an unauthorized action.
Original NVD description (English source)
Subscriber Cross Site Scripting (XSS) in Fluent Boards Pro <= 2.0.11 versions.