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CVE-2026-78273— WordPress Fluent Boards Pro plugin <= 2.0.11 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
WP Manage Ninja Fluent Boards Pro
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fluent Boards Pro 2.0.11 及更早版本中，订阅者角色存在跨站脚本（XSS）漏洞。

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-78273

Vulnerability Information
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Vulnerability Title
WordPress Fluent Boards Pro plugin <= 2.0.11 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Subscriber Cross Site Scripting (XSS) in Fluent Boards Pro <= 2.0.11 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WP Manage Ninja Fluent Boards Pro n/a ~ 2.0.11 -

II. Public POCs for CVE-2026-78273

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III. Intelligence Information for CVE-2026-78273

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Vendor Advisories for CVE-2026-78273 (1)

Same Patch Batch · WP Manage Ninja · 2026-08-27 · 7 CVEs total

CVE-2026-78274 9.1 CRITICAL WordPress Fluent Boards Pro plugin <= 2.0.11 - Arbitrary File Upload vulnerability
CVE-2026-81273 8.1 HIGH WordPress FluentBooking Pro plugin <= 2.2.4 - Cross Site Request Forgery (CSRF) vulnerabil
CVE-2026-78271 7.2 HIGH WordPress FluentCRM Pro plugin <= 3.1.12 - Privilege Escalation vulnerability
CVE-2026-78276 7.2 HIGH WordPress Fluent Boards Pro plugin <= 2.0.11 - PHP Object Injection vulnerability
CVE-2026-78275 6.8 MEDIUM WordPress Fluent Boards Pro plugin <= 2.0.11 - Arbitrary File Deletion vulnerability
CVE-2026-81272 4.9 MEDIUM WordPress FluentPlayer Pro plugin <= 1.3.2 - Broken Access Control vulnerability

IV. Related Vulnerabilities

Same product: Fluent Boards Pro
Same vendor: WP Manage Ninja
Same weakness: CWE-79

V. Comments for CVE-2026-78273

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