What is CVE-2021-47808?

CVE-2021-47808 is a medium-severity vulnerability in Cotonti Cotonti_siena, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-16.

How severe is CVE-2021-47808?

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

XSS in Cotonti Cotonti_siena

CVE-2021-47808

Cotonti Siena 0.9.19 contains a stored cross-site scripting vulnerability in the admin configuration panel's site title parameter. Attackers can inject malicious JavaScript code through the 'maintitle' parameter to execute scripts when adm…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.7th 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

Cotonti Cotonti_siena — versions 0.9.19
Cotonti.com Cotonti Siena — versions 0.9.19

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (Exploit, exploit)
disclosure@vulncheck.com (product, Broken Link)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2021-47808?: CVE-2021-47808 is a medium-severity vulnerability in Cotonti Cotonti_siena, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-16.
How severe is CVE-2021-47808?: Medium severity. CVSS v3 base score is 5.4 out of 10.