XSS in 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 administrators view the page.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (17.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Cotonti Siena — versions 0.9.19
- Cotonti.com Cotonti Siena — versions 0.9.19
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50016 (Exploit, exploit)
- cotonti.com (product, Broken Link)
- www.cotonti.com/download/ (Product, product)
- www.vulncheck.com/advisories/cotonti-siena-maintitle-stored-cross-site-scripting (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47808?
- CVE-2021-47808 is a medium-severity vulnerability in 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.