A XSS can be injected into wiki page by using the Transclude plugin.
Impact
An attacker could use this vulnerability to force a victim to execute uncontrolled code.
CVSSv3 score: 5.4 (CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
Exploitation
- Create a wiki page with the following content <?plugin Transclude src=javascript:alert(1) ?>
- Access the page the newly created wiki page
References
CWE 79
OWASP Cross-site Scripting