Cross-Site Scripting Vulnerability in onSite Auction Software
CVE-2026-96258

5.3MEDIUM

Key Information:

Vendor

Onsite Internet Gmbh

Status
Auktion Ng Auktionssoftware
Vendor
CVE Published:
23 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-96258?

A vulnerability exists in the Public Password Reset Endpoint of onSite internet GmbH's Auktion NG Auktionssoftware, specifically affecting the email manipulation within the /forgotpasswd.html file. This vulnerability allows attackers to execute arbitrary scripts in the context of a user's browser, potentially leading to the theft of sensitive information or session hijacking. The issue can be exploited remotely, enabling attackers to target affected installations without physical access. Despite notifications regarding this vulnerability, there has been a lack of response from the vendor, making it crucial for users to take immediate action to secure their systems.

Affected Version(s)

Auktion NG Auktionssoftware 20260722

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-2026-96258 - Proof of Concept

References

https://vuldb.com/vuln/408708
vdb-entrytechnical-description
https://vuldb.com/vuln/408708/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-96258
third-party-advisory

CVSS V4

Score:
5.3
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

david_12 (VulDB User)
VulDB CNA Team
.