CVE-2025-5254: Kron PAM Stored XSS Vulnerability

CVE-2025-5254 Overview

CVE-2025-5254 is a stored cross-site scripting (XSS) vulnerability in Kron Technologies Kron PAM, a privileged access management platform. The flaw stems from improper neutralization of input during web page generation [CWE-79]. An attacker with high privileges can inject malicious script content that persists in the application and executes in the browser of any user who views the affected page. Kron PAM versions before 3.7 are affected. The vulnerability was published to the National Vulnerability Database on July 25, 2025.

Critical Impact
Stored script payloads execute in the context of privileged PAM users, enabling session hijacking, credential theft, and pivoting into managed infrastructure.

Affected Products

Kron Technologies Kron PAM versions prior to 3.7
Deployments exposing the vulnerable web management interface
Environments where administrative users interact with attacker-controlled input fields

Discovery Timeline

2025-07-25 - CVE-2025-5254 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-5254

Vulnerability Analysis

Kron PAM fails to properly sanitize user-supplied input before rendering it in web pages generated by the application. Because the malicious payload is stored server-side, it executes each time a victim loads the affected page. Exploitation requires an authenticated attacker with high privileges and user interaction from the victim. The scope remains unchanged, but the confidentiality and integrity impacts on the victim's session are significant.

In a privileged access management context, this class of flaw carries elevated risk. PAM operators handle credentials, session recordings, and access policies for critical infrastructure. Script execution inside the PAM console can expose these assets to the attacker.

Root Cause

The root cause is missing or insufficient output encoding when the application renders stored data back into HTML responses. Input reaches the DOM without contextual escaping, allowing HTML and JavaScript to be interpreted as active content rather than displayed as text. This is a classic instance of [CWE-79].

Attack Vector

An authenticated attacker with administrative or elevated permissions submits a crafted payload containing script content through a vulnerable input field. The payload is persisted in the backend datastore. When another authenticated user navigates to a page that renders the stored value, the browser executes the injected script. The attacker can then exfiltrate session tokens, invoke privileged PAM actions on behalf of the victim, or modify displayed content to facilitate follow-on social engineering.

Refer to the USOM Security Notification TR-25-0178 and the Siber Güvenlik Notification TR-25-0178 for vendor-coordinated advisory details.

Detection Methods for CVE-2025-5254

Indicators of Compromise

Stored records in Kron PAM containing HTML tags such as <script>, <img onerror=...>, or <svg onload=...> in fields intended for plain text.
Outbound requests from administrator browsers to unfamiliar domains shortly after loading PAM pages.
Unexpected session token reuse from geographies or user agents that do not match the legitimate operator.

Detection Strategies

Inspect web server and application logs for POST or PUT requests containing script tags or JavaScript event handler attributes targeting PAM endpoints.
Deploy a Content Security Policy (CSP) in report-only mode and monitor violation reports for inline script execution attempts within the PAM console.
Correlate administrator authentication events with anomalous API calls that follow immediately after page loads.

Monitoring Recommendations

Forward Kron PAM application and access logs into a centralized analytics platform for query and long-term retention.
Alert on new or modified stored records that contain HTML control characters in fields where they are not expected.
Track privileged session activity for behavior that deviates from established operator baselines.

How to Mitigate CVE-2025-5254

Immediate Actions Required

Upgrade Kron PAM to version 3.7 or later, as identified in the vendor advisory.
Audit existing stored data for injected HTML or JavaScript payloads and remove or sanitize any suspicious entries.
Rotate session tokens and administrative credentials that may have been exposed through the console.
Restrict administrative access to the PAM web interface to trusted networks and hardened workstations.

Patch Information

Kron Technologies addresses the vulnerability in Kron PAM 3.7. Operators running any earlier release should plan an upgrade following the vendor's documented procedure. Coordinated advisory references are available through the USOM Security Notification TR-25-0178 and the Siber Güvenlik Notification TR-25-0178.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
Limit high-privilege account usage to isolated browsers or dedicated administrative workstations.
Apply web application firewall rules that block HTML and JavaScript patterns in requests submitted to Kron PAM input fields.

bash

# Example CSP header to reduce XSS impact on the PAM web console
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'";