Stored Cross-Site Scripting in FlexTable Plugin for WordPress by FlexSoft
CVE-2025-9543

3.5LOW

Key Information:

Vendor

WordPress
Status
Flextable
Vendor
CVE Published:
5 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9543?

The FlexTable WordPress plugin versions prior to 3.19.2 has a vulnerability where it fails to properly sanitize and escape links imported from Google Sheet cells. This flaw could enable users with administrative privileges to exploit stored cross-site scripting vulnerabilities, allowing them to inject malicious scripts into the web application, even in environments where the unfiltered_html capability is restricted, such as multisite setups. This poses a significant risk to users and the integrity of affected WordPress installations.

Affected Version(s)

FlexTable 0 < 3.19.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-9543 - Proof of Concept

References

https://wpscan.com/vulnerability/6cc212f4-aa61-409a-b257-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
3.5
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nguyễn Phước Thiện
WPScan
JSON
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CVE-2025-9543 : Stored Cross-Site Scripting in FlexTable Plugin for WordPress by FlexSoft