Cross Site Scripting in welovemedia FFmate Webhook Handler
CVE-2026-5254

5.1MEDIUM

Key Information:

Vendor

Welovemedia

Status
Ffmate
Vendor
CVE Published:
1 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5254?

A security vulnerability has been identified in the Webhook Handler component of welovemedia's FFmate, specifically within the file located at /ui/app/components/AppJsonTreeView.vue. This vulnerability enables an attacker to execute cross site scripting (XSS) attacks remotely. Exploitation of this vulnerability can lead to unauthorized actions being performed on behalf of users, potentially compromising the integrity of user data. The issue impacts versions of FFmate up to 2.0.15. Notably, the vendor was informed of this vulnerability prior to public disclosure but has not provided a response.

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Deploy the Patch

Affected Version(s)

FFmate 2.0.0

FFmate 2.0.1

FFmate 2.0.2

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-2026-5254 - Proof of Concept

References

https://vuldb.com/vuln/354444
vdb-entry
https://vuldb.com/vuln/354444/cti
signaturepermissions-required
https://vuldb.com/submit/780615
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

VulDB
JSON
.