STAGIL Navigation for Jira Menu & Themes plugin before 2.0.52 is susceptible to local file inclusion via modifying the fileName parameter to the snjFooterNavigationConfig endpoint. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can potentially allow the attacker to steal cookie-based authentication credentials and launch other attacks.
View the template here CVE-2023-26256.yaml
References:
https://nvd.nist.gov/vuln/detail/CVE-2023-26256