Cross-Site Scripting Vulnerability in Stilleshan ServerStatus Affected Versions
CVE-2026-90502

5.1MEDIUM

Key Information:

Vendor

Stilleshan

Status
Serverstatus
Vendor
CVE Published:
13 September 2026

Badges

๐Ÿ‘พ Exploit Exists๐ŸŸก Public PoC

What is CVE-2026-90502?

A vulnerability in the Stilleshan ServerStatus software allows remote attackers to exploit an unknown function in the Stats Generation component located within the file server/src/main.cpp. By manipulating the 'custom' argument, an attacker can execute cross-site scripting attacks, putting users at risk of unauthorized actions and data exposure. Despite efforts to inform the vendor about this issue, no response was received, and the exploit has since been made public, heightening the urgency for users to assess their systems.

Affected Version(s)

ServerStatus 1.0

ServerStatus 2.0

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-2026-90502 - Proof of Concept

References

https://vuldb.com/vuln/403090
vdb-entrytechnical-description
https://vuldb.com/vuln/403090/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90502
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

  • ๐ŸŸก

    Public PoC available

  • ๐Ÿ‘พ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

XiaoHei (VulDB User)
VulDB CNA Team
.