Persistent Cross-Site Scripting in Ultimate POS by Ultimate Fosters
CVE-2021-47908

5.1MEDIUM

Key Information:

Vendor

Thewebfosters

Status
Ultimate POS
Vendor
CVE Published:
1 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47908?

Ultimate POS 4.4 is prone to a persistent cross-site scripting vulnerability that affects the product name parameter. This flaw enables remote attackers to inject malicious scripts via the product addition or editing functions. By exploiting this vulnerability, attackers can execute arbitrary JavaScript code, potentially leading to session hijacking and unauthorized access to user data.

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Affected Version(s)

Unknown 4.4

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-2021-47908 - Proof of Concept

References

https://www.vulnerability-lab.com/get_content.php?id=2296
exploit
https://ultimatefosters.com/docs/ultimatepos/
product
https://www.vulncheck.com/advisories/ultimate-pos-persist...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
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

Vulnerability-Lab [Research Team]
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