CVE-2026-109565 in Rapyd Admin
Summary
by MITRE • 10/13/2026
Rapyd Admin from 9.4.0 before 9.20.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through self-registered display names. Attackers can register with an HTML or JavaScript name rendered unescaped in the Activity log Author filter, executing in an administrator's session.
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Analysis
by VulDB Data Team • 10/13/2026
The Rapyd Admin platform version 9.4.0 prior to patch level 9.20.0 contains a critical stored cross-site scripting vulnerability that stems from insufficient input validation and output encoding mechanisms within the user registration workflow. This flaw allows unauthenticated attackers to inject malicious client-side scripts by exploiting the display name field during account creation. The core technical deficiency lies in the application's failure to properly sanitize or encode special characters when storing and subsequently rendering these names, particularly within administrative interface components that process activity logs.
The operational impact of this vulnerability is significant because it enables persistent script execution without requiring prior authentication for the initial injection phase. An attacker can register a new account using a display name containing HTML tags or JavaScript code snippets. When an administrator views the Activity log and utilizes the Author filter to view entries associated with that specific user, the browser renders the stored malicious payload directly within the administrative context. This results in the execution of arbitrary scripts under the security privileges of the logged-in administrator session.
This attack vector aligns closely with CWE-79, which classifies improper neutralization of input during web page generation as a cross-site scripting weakness. Furthermore, from an adversary behavior perspective, this vulnerability facilitates techniques associated with ATT&CK T1059, specifically command and script interpretation via browser-based execution. The persistence aspect is heightened because the payload remains stored in the database until manually removed or the affected user account is deleted, allowing for repeated exploitation against any administrator who accesses the filtered log view.
The consequences of successful exploitation include session hijacking, where attackers can steal administrative cookies to impersonate privileged users and gain full control over the Rapyd Admin environment. Additionally, it enables data exfiltration by reading sensitive information displayed on the admin dashboard or redirecting administrators to phishing sites designed to capture further credentials. In severe cases, this could lead to complete compromise of payment processing infrastructure managed through the platform if administrative functions are abused.
To mitigate this vulnerability, organizations must immediately upgrade Rapyd Admin to version 9.20.0 or later where these input validation and output encoding issues have been addressed by the vendor. Until an upgrade is feasible, administrators should implement strict content security policies that restrict script execution from untrusted sources and disable unnecessary administrative features if not actively required. Input sanitization libraries should be employed at both the application layer to validate display names against a whitelist of allowed characters and at the presentation layer to ensure all user-supplied data is HTML-encoded before rendering in any context, particularly within dynamic filters and logs.