What’s Vulnerable › Vulnerabilities

CVE-2021-27309

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-23 · updated 2026-06-17
• Weakness: CWE-79

Description

Clansphere CMS 2011.4 allows unauthenticated reflected XSS via "module" parameter.

Affected products

• ClanSphere Project ClanSphere: 2011.4

References

• https://github.com/xoffense/POC/blob/main/Clansphere%202011.4%20%22module%22%20xss.md
• https://github.com/xoffense/POC/blob/main/Clansphere%202011.4%20%22module%22%20xss.md

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