CVE-2023-29489 is a medium-severity vulnerability affecting cPanel versions prior to 11.109.9999.116. This vulnerability allows for cross-site scripting (XSS) attacks via an invalid webcall ID on the cpsrvd error page. The vulnerability poses a risk of unauthorized script execution, which could potentially lead to data exposure or manipulation. Organizations should prioritize patching to mitigate this risk.
The CVSS score for this vulnerability is 5.3, indicating medium severity, with a network attack vector that requires user interaction. The attack complexity is low, meaning that an attacker could exploit the vulnerability without significant technical skills. This makes it crucial for organizations to address this issue promptly.
Risk to organizations includes the potential for unauthorized access to sensitive information through the exploitation of this vulnerability. Attackers may leverage this flaw to execute scripts in the context of the user's browser, leading to further exploitation or data compromise. Therefore, it is essential to apply the necessary security patches as soon as possible.
Organizations should prioritize patching immediately. Fixed versions of cPanel are 11.109.9999.116, 11.108.0.13, 11.106.0.18, and 11.102.0.31. Failing to update systems could leave them vulnerable to exploit attempts, particularly since scripts and tools related to this vulnerability are already available in various repositories.
Vulnerability Details
An issue was discovered in cPanel before 11.109.9999.116. XSS can occur on the cpsrvd error page via an invalid webcall ID, also known as SEC-669. The fixed versions include 11.109.9999.116, 11.108.0.13, 11.106.0.18, and 11.102.0.31. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')).
The CVSS score assigned to this vulnerability by NVD is 6.1, suggesting that it poses a medium risk due to its potential impact on confidentiality and integrity. The attack vector is classified as network-based, with no privileges required for exploitation, yet user interaction is necessary.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of inputs on the cpsrvd error page. When an invalid webcall ID is processed, it leads to the execution of malicious scripts in the context of the user’s session. This vulnerability can be exploited without the need for elevated privileges, as it requires only a local user to interact with the error page.
The attack complexity is rated as low, making it accessible for attackers with basic technical knowledge. No user interaction is required for the attacker to initiate the exploit, which heightens the risk of exploitation. The scope remains unchanged, indicating that the vulnerability does not affect other components beyond the immediate context.
The impacts on confidentiality, integrity, and availability are classified as low, but the potential for unauthorized access to user data through script execution remains a significant concern.
Risk & Impact Analysis
The deployment of cPanel in a production environment increases the risk of exposure to this vulnerability significantly. Organizations utilizing cPanel should be aware of the potential blast radius, which could include unauthorized access to sensitive user information and service disruption. The urgency of addressing this vulnerability is underscored by its medium CVSS score and the availability of exploit tools on public repositories.
With an EPSS score above 0.9, indicating a high likelihood of exploitation, organizations must evaluate their exposure to this vulnerability carefully. The presence of multiple repositories on GitHub demonstrating the vulnerability further highlights the need for swift remediation.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of cPanel include all versions prior to 11.109.9999.116, specifically versions 11.102.0.31, 11.106.0.18, and 11.108.0.13. Organizations should ensure they update to the fixed versions to protect against this vulnerability.
Mitigation & Remediation
Organizations must apply security patches available for cPanel to remediate this vulnerability. The fixed versions include 11.109.9999.116, 11.108.0.13, 11.106.0.18, and 11.102.0.31. If immediate patching is not possible, it is recommended to implement web application firewall rules to mitigate XSS attacks and monitor logs for suspicious activity.
For further details on implementing security measures, organizations can refer to application security assessment best practices.
Detection Guidance
Organizations should monitor logs for unusual error messages or scripts that may indicate exploitation attempts. Behavioral anomalies such as unexpected input validation failures or unauthorized access attempts should be investigated thoroughly. Signature-based detection for known attack patterns associated with XSS vulnerabilities can also be beneficial.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-29489 lies in the increasing prevalence of XSS vulnerabilities within web applications. This incident highlights the need for robust input validation and error handling to prevent similar vulnerabilities in the future. Security teams should take this opportunity to review and strengthen their application security practices.
For more insights on securing web applications, consider reading about web application penetration testing methodologies and best practices.
Additionally, organizations should remain aware of emerging threats and trends in the security landscape by following resources on penetration testing methodologies and effective remediation strategies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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