What is the CVSS score of CVE-2021-47843?

CVE-2021-47843 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Tagstoo are affected by CVE-2021-47843?

Organizations using Tagstoo 2.0.1 should be aware of moderate risk from CVE-2021-47843, a cross-site scripting vulnerability rated CVSS 5.4.

Is there a public PoC exploit available for CVE-2021-47843?

Yes, a public proof-of-concept exploit is available for CVE-2021-47843. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2021-47843?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Tagstoo CVE-2021-47843

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-15 disclosure@vulncheck.com

RCE XSS Tagstoo

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 05, 2026 - 19:20 vuln.today

Public exploit code

CVE Published

Jan 15, 2026 - 16:16 nvd

MEDIUM 5.4

DescriptionCVE.org

Tagstoo 2.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious payloads through files or custom tags. Attackers can execute arbitrary JavaScript code to spawn system processes, access files, and perform remote code execution on the victim's computer.

AnalysisAI

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Tagstoo. Tagstoo 2.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious payloads through files or custom tags. Attackers can execute arbitrary JavaScript code to spawn system processes, access files, and perform remote code execution on the victim's computer.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2021-47843 vulnerability details – vuln.today

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