CVE-2021-27310
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
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
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
- Record
CVE-2021-27310- 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 List No score
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
- Record
CVE-2021-27310- Updated
- 2026-11-02
EUVDEUVD-2021-14071 No score
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
- Record
EUVD-2021-14071- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gwcx-pjgx-wqm5 No score
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "language" parameter.
- Record
GHSA-gwcx-pjgx-wqm5- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Clansphere CMS 2011.4 - Cross-Site Scripting |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27310 is a medium vulnerability (CVSS 6.1) in Csphere Clansphere, published March 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.82%, the 86th percentile. No source names a fixed version.