CVE-2021-47808

Name: CVE-2021-47808
Creator: NVD / NIST
Published: 2026-01-16T00:16:25.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2021-47808 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

CVSS 4.0

5.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.24%

14.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Cotonti	Cotonti Siena	0.9.19

References

https://cotonti.comBroken Link
https://www.cotonti.com/download/Product
https://www.exploit-db.com/exploits/50016Exploit
https://www.vulncheck.com/advisories/cotonti-siena-maintitle-stored-cross-site-scriptingThird Party Advisory
https://www.exploit-db.com/exploits/50016Exploit

Timeline

Published: Jan 16, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-47808?

How severe is CVE-2021-47808?

CVE-2021-47808 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47808?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47808?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST