CVE-2025-24011 is a medium-severity vulnerability affecting Umbraco, a popular open-source .NET content management system. This vulnerability allows attackers to determine whether an account exists by analyzing response codes and the timing of responses from the Umbraco management API. Specifically, it affects versions starting from 14.0.0 up to but not including 14.3.2 and 15.1.2, which contain patches to address this issue. Due to the nature of this vulnerability, organizations are urged to take immediate action to protect their systems.
The CVSS score for this vulnerability is 5.3, indicating a medium severity level. This score reflects a network attack vector with low attack complexity, requiring no privileges or user interaction to exploit. Risk to organizations includes unauthorized information disclosure that may lead to further attacks, especially in environments where sensitive user data is handled. As this vulnerability allows for account enumeration, it can facilitate targeted attacks against users.
Currently, no public exploits have been confirmed for this vulnerability; however, a proof of concept (PoC) is available on GitHub, which showcases the potential for exploitation. Organizations should prioritize patching their Umbraco instances immediately to mitigate the risk of exploitation.
Given the increasing sophistication of cyber threats, the existence of this vulnerability highlights the need for organizations to remain vigilant. Regular security assessments and timely patching can significantly reduce exposure to such vulnerabilities.
Vulnerability Details
The vulnerability is classified under CWE-200 (Information Exposure) and CWE-203 (Information Exposure through Discrepancy). The official description states that it is possible to determine whether an account exists based on API response analysis. This is particularly concerning as it could aid in targeted attacks by malicious actors.
The CVSS vector string for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating a low impact on confidentiality while integrity and availability are unaffected. This suggests a moderate risk to organizations using affected versions of Umbraco.
Technical Analysis
The root cause of this vulnerability stems from the way the Umbraco management API handles responses. Specifically, the timing and response codes do not adequately obscure whether an account exists, allowing attackers to infer account existence through analysis.
The attack vector is network-based, meaning that attackers do not need physical access to the system to exploit this vulnerability. Additionally, the attack complexity is low, and no privileges or user interaction is required. As such, this vulnerability presents a significant risk to organizations that have not yet patched their systems.
In terms of impacts, this vulnerability has a low confidentiality impact as it allows for account enumeration but does not compromise data integrity or availability. Organizations using affected versions of Umbraco should assess their exposure and take necessary actions.
Risk & Impact Analysis
The risk to organizations includes the potential for targeted attacks based on the information disclosed through this vulnerability. Attackers may leverage this vulnerability to gain knowledge of existing accounts, which can be a precursor to more severe attacks such as credential stuffing or social engineering.
Given the current threat landscape, organizations utilizing Umbraco must recognize the urgency of addressing this vulnerability. Organizations should prioritize patching immediately, particularly in environments where sensitive data is processed or stored, as the risk of exploitation can lead to significant data breaches.
The exploitation potential is further exemplified by the EPSS score of 0.3516, which places this vulnerability in the 97th percentile, indicating a high likelihood of exploitation in the wild. Organizations must act swiftly to reduce their exposure to this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Umbraco CMS include all versions from 14.0.0 to 14.3.1 and from 15.0.0 to 15.1.1. Organizations using these versions should upgrade to 14.3.2 or 15.1.2 to mitigate the vulnerability.
Mitigation & Remediation
To mitigate the risks associated with CVE-2025-24011, organizations should immediately apply the patches provided in versions 14.3.2 and 15.1.2 of Umbraco CMS. If an upgrade is not possible, consider implementing network controls to restrict access to the API and monitor for any unusual activity indicative of enumeration attempts.
Additionally, organizations can benefit from conducting regular security assessments and penetration testing to identify and remediate similar vulnerabilities proactively. Engaging in a thorough review of application security practices can also help in hardening systems against such attacks.
Continuous penetration testing is recommended as part of an ongoing security strategy to ensure the integrity and confidentiality of user accounts.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual access patterns or repeated requests to the Umbraco management API. Look for discrepancies in response times that may indicate enumeration attempts. Implementing alerting mechanisms for suspicious activities can help in early detection of potential breaches.
AppSecure Threat Intelligence Insight
CVE-2025-24011 serves as a reminder of the importance of secure API design. The ability to infer account existence through timing analysis highlights a gap that can be exploited by malicious actors. Security teams should take this as an opportunity to review their API implementations and ensure proper obfuscation of response data.
Organizations are encouraged to familiarize themselves with best practices in API security, including rate limiting and robust logging mechanisms, to prevent similar vulnerabilities in the future. Engaging in a comprehensive API security testing strategy can further enhance resilience against evolving threats.
By staying informed about emerging vulnerabilities and applying timely patches, organizations can significantly reduce their risk exposure. Regular training and awareness initiatives for development teams are also essential in fostering a security-first culture.
For comprehensive security assessments, organizations can consider leveraging services such as application security assessments to identify and address potential weaknesses proactively.
This vulnerability underscores the necessity for organizations to adopt a proactive approach to security management, ensuring that they are not only compliant with current regulations but also resilient against future threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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