CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered in versions prior to 4.24.0-lts in samples that use the `preview` feature. All integrators that use these samples in the production code can be affected. The vulnerability allows an attacker to execute JavaScript code by abusing the misconfigured preview feature. It affects all users using the CKEditor 4 at version < 4.24.0-lts with affected samples used in a production environment. A fix is available in version 4.24.0-lts.
The vulnerability has a CVSS score of 6.1, indicating a medium severity level. This score signifies a moderate level of risk to organizations, particularly those utilizing CKEditor in their web applications. The attack vector is network-based, requiring user interaction, which increases the likelihood of exploitation in environments where users can interact with the CKEditor preview feature.
Organizations should prioritize patching immediately to mitigate potential exploitation risks. The published date of the vulnerability is February 7, 2024, and it remains critical for organizations to assess their CKEditor implementations to ensure they are not vulnerable.
The vulnerability is classified under CWE-79, indicating it is a cross-site scripting (XSS) issue. Attackers may leverage this vulnerability to perform unauthorized actions on behalf of users, which can lead to data theft or other malicious activities.
Vulnerability Details
CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered in versions prior to 4.24.0-lts in samples that use the `preview` feature. All integrators that use these samples in the production code can be affected. The vulnerability allows an attacker to execute JavaScript code by abusing the misconfigured preview feature. It affects all users using the CKEditor 4 at version < 4.24.0-lts with affected samples used in a production environment.
The CVSS score for this vulnerability is 6.1, which reflects a medium severity level. The attack vector is network-based, with low complexity and no required privileges. User interaction is necessary, as the vulnerability can be exploited only when a user interacts with the CKEditor samples that utilize the preview feature. The potential impacts include low confidentiality and integrity, with no availability impact.
Technical Analysis
The root cause of this vulnerability is a misconfiguration of the preview feature in CKEditor 4. This allows an attacker to inject and execute arbitrary JavaScript code within the context of the user’s browser. The attack vector is network-based, meaning it can be exploited remotely without physical access to the affected system.
The attack complexity is low, as no advanced skills are required to exploit this vulnerability. Privileges required are none, making it accessible to any user who can trigger the preview feature. User interaction is required, as the attack is executed when the user interacts with the compromised feature.
The impact on confidentiality and integrity is low, as the vulnerability does not directly compromise stored data. However, it can lead to unauthorized actions performed in the context of the user, which can have broader implications depending on the application’s functionality.
Overall, the vulnerability poses a significant risk to organizations using CKEditor 4, particularly in environments where users are allowed to interact with the editor's preview feature.
Risk & Impact Analysis
Risk to organizations includes potential data theft and unauthorized actions taken on behalf of users. Given that the vulnerability affects all CKEditor 4 versions prior to 4.24.0-lts, organizations using the editor should evaluate their deployments promptly.
The attack surface for this vulnerability is expanded in applications that integrate CKEditor without proper sanitization or validation. The blast radius could be significant in web applications that rely heavily on user-generated content or dynamic previews, which could lead to severe exploitation if left unaddressed.
Organizations should address this vulnerability in their priority patch cycle, especially those with a high user interaction rate with CKEditor instances. Given the nature of the vulnerability, the urgency is medium, but immediate action is recommended to prevent exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to 4.24.0-lts of CKEditor 4 are affected by this vulnerability. Users should upgrade to version 4.24.0-lts or later to mitigate the risk.
Mitigation & Remediation
Users should apply the patch available in version 4.24.0-lts of CKEditor to remediate this vulnerability. If the patch cannot be applied immediately, consider implementing workarounds such as disabling the preview feature in affected integrations until an upgrade can be performed.
Configuration hardening should include reviewing all CKEditor configurations to ensure that user-generated content is properly sanitized and validated. Network controls such as web application firewalls (WAF) can help mitigate exposure to potential exploitation.
Monitoring recommendations include setting up alerts for any unusual activity related to CKEditor instances, particularly actions performed through the preview feature.
Detection Guidance
Log indicators should be established to capture any attempts to exploit this vulnerability. Behavioral anomalies, such as unexpected JavaScript execution within CKEditor previews, should be monitored closely.
Network signatures that reflect attempts to trigger the preview feature with malicious intent may also be useful in detecting potential exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its demonstration of the risks associated with user-generated content and misconfigured features in web applications. Security teams should learn from this incident to strengthen their defenses against similar vulnerabilities.
This vulnerability highlights the importance of thorough testing and validation of third-party components, especially those that handle user input. Organizations should consider incorporating regular security assessments, such as penetration testing, into their development lifecycle.
In conclusion, security teams must remain vigilant and proactive in addressing vulnerabilities like CVE-2024-24816 to mitigate risks and protect sensitive data.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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