Stored Cross-Site Scripting Vulnerability in Tagstoo by Tagstoo
CVE-2021-47843

5.1MEDIUM

Key Information:

Vendor

Tagstoo

Status
Tagstoo
Vendor
CVE Published:
15 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47843?

Tagstoo version 2.0.1 has a stored cross-site scripting flaw that allows attackers to inject malicious scripts through files or custom tags. This vulnerability can be exploited to execute arbitrary JavaScript code, potentially leading to unauthorized system processes, file access, and remote code execution on the victim's device.

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Affected Version(s)

Tagstoo 2.0.1

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-2021-47843 - Proof of Concept

References

https://www.exploit-db.com/exploits/49828
exploit
https://tagstoo.sourceforge.io/
product
https://imgur.com/a/smeAjaW
product

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

TaurusOmar
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