CVE-2026-97240 in Stifli Backup Tools Plugin
Summary
by MITRE • 09/30/2026
Unauthenticated Sensitive Data Exposure in StifLi Backup Tools <= 2.2.7 versions.
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified as an unauthenticated sensitive data exposure within StifLi Backup Tools, specifically affecting versions up to and including 2.2.7, represents a critical failure in access control mechanisms that allows attackers to retrieve confidential information without valid credentials. This type of flaw typically stems from the improper implementation of authentication checks on administrative endpoints or configuration files exposed by the backup utility's web interface or API. In many legacy or poorly secured backup applications, developers may inadvertently expose internal management interfaces that are intended for local network administration but remain accessible over broader networks due to default configurations or missing IP whitelisting restrictions. The absence of robust session validation means that any actor with network connectivity to the affected service can interact directly with these endpoints, bypassing the expected security perimeter entirely.
From a technical perspective, this vulnerability aligns closely with CWE-200: Exposure of Sensitive Information to an Unauthorized Actor and often overlaps with CWE-613: Insufficient Session Expiration if session tokens are not properly invalidated or validated during data retrieval operations. The core issue lies in the server's failure to verify that the requesting entity possesses valid administrative privileges before serving sensitive payloads such as database dumps, configuration files containing plaintext passwords, SSH keys, or encryption certificates. When a backup tool processes requests for system status, log exports, or file listings without enforcing strict authentication protocols, it effectively creates an open door for information disclosure. This is particularly dangerous in environments where the backup server holds aggregated data from multiple critical systems, thereby amplifying the blast radius of a single compromised instance.
The operational impact of this vulnerability extends beyond simple privacy violations and can lead to severe systemic compromise. Attackers leveraging this flaw can harvest sensitive configuration details that reveal internal network topology, database connection strings with embedded credentials, or private keys used for secure communications. This information serves as high-value intelligence for subsequent attack phases, such as credential stuffing, lateral movement within the enterprise network, or even full system takeover if cryptographic material is compromised. Furthermore, because backup tools often run with elevated privileges to access all files on a host, an attacker gaining unauthenticated access may also be able to manipulate backup archives, potentially introducing malware into recovery processes or deleting critical data to facilitate ransomware attacks. The exposure undermines the fundamental trust model of backup infrastructure, which relies on integrity and confidentiality guarantees that are now broken.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The most effective solution is to upgrade StifLi Backup Tools to a version greater than 2.2.7 where these access control flaws have been patched by the vendor. If upgrading is not immediately feasible, administrators should implement network-level controls such as firewall rules or reverse proxy configurations that restrict access to the backup tool's management interface exclusively from trusted internal IP addresses. Additionally, enabling mutual TLS authentication for administrative endpoints can provide an additional layer of verification beyond standard username and password combinations. It is also crucial to conduct a thorough audit of exposed services using vulnerability scanners configured with unauthenticated testing profiles to identify similar misconfigurations across other legacy applications in the environment. Regular security assessments that include penetration testing focused on access control bypasses are essential for maintaining the integrity of backup infrastructure against evolving threats aligned with MITRE ATT&CK techniques such as T1005: Data from Local System and T1530: Data from Cloud Storage Object, depending on how backups are stored.