CVE-2026-71801 in SPMS-Server
Summary
by MITRE • 09/09/2026
An issue was discovered in s-pms SPMS-Server through v1.0. The application contains a hardcoded default access token secret within its core configuration file, which is not overridden or removed in the production environment profile. A remote, unauthenticated attacker can locally forge valid administrative session tokens to completely bypass the authentication mechanism gaining full unauthorized access to protected backend APIs.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified in s-pms SPMS-Server versions up to v1.0 represents a critical failure in identity and access management controls, specifically categorized under CWE-798: Use of Hard-coded Credentials. This flaw stems from the application's configuration architecture, where a default secret key for signing administrative session tokens is embedded directly within the core configuration file. Crucially, this static credential is not overridden or removed when the software is deployed in production environments. In secure development practices, secrets such as token signing keys must be externalized and managed through environment variables or dedicated secret management systems to ensure they can be rotated independently of application code changes. The persistence of a default, unchangeable secret creates a predictable attack surface that undermines the fundamental assumption of authentication integrity.
From an operational perspective, this misconfiguration allows for complete bypassing of the authentication mechanism via CWE-287: Improper Authentication. Because the attacker knows or can easily discover the hardcoded secret used to sign tokens, they are able to locally forge valid administrative session tokens without possessing any legitimate credentials. This capability effectively nullifies the server's ability to distinguish between authenticated administrators and unauthenticated actors. The vulnerability enables remote, unauthenticated access to protected backend APIs, granting the adversary full control over the application's administrative functions. This level of access typically includes the ability to modify system configurations, manipulate user data, execute privileged commands, or exfiltrate sensitive information stored within the managed systems.
The impact extends beyond simple unauthorized access, as it compromises the confidentiality, integrity, and availability of the entire service ecosystem protected by SPMS-Server. An attacker leveraging this flaw can perform actions indistinguishable from those of a legitimate system administrator, including creating new user accounts with elevated privileges, deleting critical data, or installing malicious components if such capabilities exist within the API scope. This scenario aligns with ATT&CK technique T1078: Valid Accounts, where adversaries use valid credentials to maintain persistent access and evade detection mechanisms that rely on identifying anomalous login behaviors from unknown sources. Since the forged tokens appear legitimate to the server's validation logic, standard logging and monitoring tools may fail to flag these activities as malicious unless behavioral analytics are specifically tuned for token forgery patterns.
Mitigation strategies must prioritize immediate remediation of the configuration flaw alongside broader security hardening measures. The primary corrective action is to remove the hardcoded default secret from the core configuration file entirely. Instead, administrators should implement a robust secrets management strategy where the token signing key is generated dynamically during deployment or retrieved securely from an external vault service such as HashiCorp Vault or AWS Secrets Manager. This ensures that each production instance utilizes a unique, unpredictable secret that cannot be reverse-engineered by attackers. Additionally, developers must enforce strict separation of configuration profiles to ensure that development defaults are never propagated to staging or production environments through automated deployment pipelines.
Beyond immediate patching, organizations should adopt defense-in-depth principles to limit the blast radius of such vulnerabilities. Implementing short-lived session tokens reduces the window of opportunity for an attacker to exploit a forged token before it expires. Integrating comprehensive audit logging that records not just authentication successes and failures but also token validation outcomes can aid in detecting forgery attempts if the signature verification logic is later strengthened or monitored externally. Furthermore, regular security assessments including static application security testing (SAST) should be integrated into the CI/CD pipeline to automatically detect hard-coded secrets before they reach production systems. This proactive approach helps prevent recurrence of CWE-798 and ensures that identity management controls remain resilient against credential-based attacks.