CVE-2021-40868
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
- Record
CVE-2021-40868- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE ListNo score
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
- Record
CVE-2021-40868- Updated
- 2026-11-02
EUVDEUVD-2021-28023No score
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
- Record
EUVD-2021-28023- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-66gc-ch9m-r42vNo score
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.
- Record
GHSA-66gc-ch9m-r42v- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Cloudron 6.2 - 'returnTo ' Cross Site Scripting (Reflected) | 2021-09-22 |
| Nuclei | Cloudron 6.2 Cross-Site Scripting |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-40868 is a medium vulnerability (CVSS 6.1) in Cloudron, published September 21, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.07%, the 95th percentile. No source names a fixed version.