What is CVE-2021-47843?

CVE-2021-47843 is a medium-severity vulnerability in Pabloandumundu Tagstoo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-15.

How severe is CVE-2021-47843?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Pabloandumundu Tagstoo

CVE-2021-47843

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (31.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Pabloandumundu Tagstoo — versions 2.0.1
Tagstoo — versions 2.0.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Exploit, product)

Frequently asked questions

What is CVE-2021-47843?: CVE-2021-47843 is a medium-severity vulnerability in Pabloandumundu Tagstoo, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-15.
How severe is CVE-2021-47843?: Medium severity. CVSS v3 base score is 5.4 out of 10.