CVE-2010-0989 in Pulse
Summary
by MITRE
Directory traversal vulnerability in delete.php in Pulse CMS before 1.2.3 allows remote authenticated users to delete arbitrary files via directory traversal sequences in the f parameter.
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Analysis
by VulDB Data Team • 05/03/2026
The vulnerability identified as CVE-2010-0989 represents a critical directory traversal flaw in Pulse CMS versions prior to 1.2.3, specifically affecting the delete.php script. This weakness enables authenticated remote attackers to exploit file deletion capabilities beyond the intended scope by manipulating the f parameter through directory traversal sequences. The vulnerability stems from insufficient input validation and sanitization within the file deletion mechanism, allowing malicious actors to craft malicious requests that traverse directory structures and target files outside the intended operational boundaries.
The technical implementation of this vulnerability resides in the improper handling of user-supplied input within the delete.php script. When an authenticated user submits a request containing a crafted f parameter value, the application fails to adequately validate or sanitize the input before processing file deletion operations. This allows attackers to include directory traversal sequences such as ../ or ..\ in the parameter value, effectively bypassing normal file access controls and gaining the ability to delete files anywhere within the web application's directory structure. The flaw operates at the application layer and specifically targets the file system interaction mechanisms, making it particularly dangerous as it can potentially allow deletion of critical system files, configuration files, or even the application itself.
From an operational impact perspective, this vulnerability poses significant risks to Pulse CMS deployments, as it enables authenticated attackers to perform unauthorized file deletion operations that could severely compromise system integrity and availability. The vulnerability allows for arbitrary file deletion, meaning that an attacker with valid credentials could potentially remove critical application files, configuration data, or even system files that could lead to complete application failure or system compromise. The authenticated nature of the vulnerability means that attackers must first obtain valid user credentials, but this is often achievable through various social engineering, credential stuffing, or other attack vectors that are commonly exploited in real-world scenarios.
The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This classification indicates that the flaw represents a fundamental security weakness in how the application handles file system paths and validates user input. The attack vector follows patterns consistent with the MITRE ATT&CK framework's privilege escalation and defense evasion techniques, where attackers leverage application vulnerabilities to gain broader system access and potentially maintain persistent access. Organizations using Pulse CMS versions prior to 1.2.3 should consider this vulnerability as part of a broader attack surface that could lead to complete system compromise if exploited effectively.
Mitigation strategies for CVE-2010-0989 should focus on immediate patching of the Pulse CMS application to version 1.2.3 or later, which contains the necessary input validation and sanitization fixes. Additionally, organizations should implement comprehensive input validation mechanisms that sanitize all user-supplied data before processing, particularly for file system operations. Network-level controls such as web application firewalls can provide additional protection by detecting and blocking suspicious directory traversal patterns in incoming requests. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications, and access controls should be properly configured to limit user privileges to the minimum required for legitimate operations. The implementation of proper file system access controls and the principle of least privilege should be enforced to minimize the potential impact of such vulnerabilities.