Cross-Site Scripting Vulnerability in Mettle Sendportal by Mettle
CVE-2026-10234

5.1MEDIUM

Key Information:

Vendor

Mettle

Status
Sendportal
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10234?

A cross-site scripting vulnerability has been identified in Mettle Sendportal, specifically in the campaign handler component located within the /webview/ section. This vulnerability allows remote attackers to manipulate content arguments, which may lead to unauthorized script execution in the user's browser. This issue was reported to the developers, but as of now, they have not issued a response. The public confirmation of this exploit emphasizes the urgency for users to apply necessary precautions.

Affected Version(s)

sendportal 3.0.0

sendportal 3.0.1

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-2026-10234 - Proof of Concept

References

https://vuldb.com/vuln/367513
vdb-entrytechnical-description
https://vuldb.com/vuln/367513/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10234
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

B1scuit (VulDB User)
VulDB CNA Team
.