CVE-2021-47808 Cotonti Siena 0.9.19 - 'maintitle' Stored Cross-Site Scripting
Attackers can inject malicious JavaScript via the site title parameter, leading to script execution when administrators view the configuration page.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47808?
CVE-2021-47808 is a medium-severity cross-site scripting vulnerability in cotonti.com Cotonti Siena, published on 15 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2021-47808?
It affects 1 product.
Products include Cotonti Cotonti Siena.
How do I fix CVE-2021-47808?
No fix has been published for CVE-2021-47808 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-47808 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47808 exists.
Other vulnerabilities in cotonti.com Cotonti Siena
Sources
Also known as GHSA-gqqp-x5qv-896x.