CVE-2025-15622 Overview
CVE-2025-15622 is an Insufficiently Protected Credentials vulnerability (CWE-522) affecting Sparx Systems Pty Ltd's Sparx Enterprise Architect desktop application. The vulnerability exposes plaintext OAuth2 client secrets during the OpenID authentication flow. The desktop client decodes stored secrets and transmits them in plaintext form when exchanging credentials for access tokens and ID tokens, potentially exposing sensitive authentication material to local attackers.
Critical Impact
Exposure of OAuth2 client secrets could allow attackers with local access to intercept authentication credentials and potentially gain unauthorized access to connected systems or impersonate legitimate users.
Affected Products
- Sparx Systems Enterprise Architect (versions prior to security patch)
Discovery Timeline
- 2026-04-17 - CVE CVE-2025-15622 published to NVD
- 2026-04-17 - Last updated in NVD database
Technical Details for CVE-2025-15622
Vulnerability Analysis
This vulnerability represents a fundamental flaw in how the Sparx Enterprise Architect desktop client handles OAuth2 credentials during the OpenID Connect authentication workflow. The application stores OAuth2 client secrets in an encoded format, but the decoding mechanism and subsequent handling exposes these secrets in plaintext during runtime operations.
When a user initiates authentication, the client retrieves the stored credentials, decodes the client secret, and uses the plaintext value to communicate with the authorization server. This process creates multiple opportunities for credential interception through memory inspection, process monitoring, or network traffic analysis on the local system.
The vulnerability is classified as a local attack vector, requiring the attacker to have some form of access to the target system. However, the potential downstream impact extends beyond the local system, as compromised OAuth2 client secrets could be leveraged to access external resources and services that rely on the OpenID authentication flow.
Root Cause
The root cause of this vulnerability lies in improper credential handling within the desktop client application. Rather than utilizing secure credential storage mechanisms provided by the operating system (such as Windows Credential Manager or macOS Keychain) and maintaining secrets in protected memory regions, the application implements its own encoding scheme that provides insufficient protection. The decoded credentials exist in plaintext memory during the authentication process, violating secure credential handling best practices.
Attack Vector
The attack vector for CVE-2025-15622 requires local access to the system running Sparx Enterprise Architect. An attacker could exploit this vulnerability through several methods:
- Memory Analysis: Attaching a debugger or using memory inspection tools to capture the plaintext client secret during the authentication process
- Process Monitoring: Intercepting inter-process communications or API calls made by the application
- Network Sniffing: If the communication occurs over an unencrypted local channel, capturing the credentials during transmission to the authorization server
- Credential File Access: Locating and decoding stored credential files if the encoding mechanism can be reverse-engineered
Once the OAuth2 client secret is obtained, an attacker could potentially forge authentication requests, access protected resources, or perform actions under the identity of the compromised client.
Detection Methods for CVE-2025-15622
Indicators of Compromise
- Unusual process attachment or debugging activity targeting Sparx Enterprise Architect processes
- Unexpected access to credential storage locations used by Enterprise Architect
- Anomalous OAuth2 token requests from unexpected network locations or clients
- Memory dump files containing application process data
Detection Strategies
- Monitor for debugger attachment to EA.exe or related Sparx Systems processes
- Implement endpoint detection for credential harvesting tools and memory inspection utilities
- Track OAuth2 token exchange patterns for anomalies in timing, frequency, or source
- Deploy file integrity monitoring on Enterprise Architect configuration directories
Monitoring Recommendations
- Enable detailed logging on OAuth2 authorization servers to detect suspicious token requests
- Implement behavioral analytics to identify abnormal authentication patterns
- Monitor endpoint activity for known credential extraction techniques
- Review access logs for Enterprise Architect client connections from unusual IP addresses
How to Mitigate CVE-2025-15622
Immediate Actions Required
- Review the Sparx Systems Product History for available security updates
- Implement network segmentation to limit the exposure of systems running Enterprise Architect
- Enable multi-factor authentication on connected OAuth2-protected resources where possible
- Audit current OAuth2 client credentials and rotate them as a precautionary measure
Patch Information
Sparx Systems has released information regarding this vulnerability. Organizations using Sparx Enterprise Architect should consult the vendor's official security communications and product history documentation at Sparx Systems Product History to obtain the latest security updates and patching guidance.
Workarounds
- Restrict local administrative access on workstations running Enterprise Architect to reduce attack surface
- Implement application whitelisting to prevent unauthorized debugging tools from attaching to processes
- Consider network-level authentication controls as an additional layer of protection for OAuth2 flows
- Enable enhanced endpoint protection to detect and block credential harvesting attempts
# Example: Restrict debugger attachment on Windows using local policy
# Run as Administrator
reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\EA.exe" /v Debugger /t REG_SZ /d "" /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
