CVE-2026-23795 identifies an improper restriction of XML External Entity (XXE) reference vulnerability in Apache Syncope Console. This vulnerability allows an administrator with the appropriate entitlements to create or edit Keymaster parameters to construct malicious XML text, which may lead to sensitive data leakage. This issue affects Apache Syncope versions from 3.0 through 3.0.15 and from 4.0 through 4.0.3. Users are recommended to upgrade to version 3.0.16 or 4.0.4 to address this vulnerability.
The severity level of this vulnerability is classified as medium, with a CVSS score of 4.9. Given the nature of the flaw and the potential for sensitive data exposure, organizations must prioritize remediation efforts. The risk to organizations includes unauthorized data access and possible compliance violations.
Currently, there are no known exploits or public proof of concepts available. This suggests that while the vulnerability is significant, active exploitation is not yet observed. Nevertheless, it is crucial for organizations to remain vigilant and take proactive measures to mitigate potential risks.
Organizations should prioritize patching immediately to prevent any potential breaches that could arise from this vulnerability.
Vulnerability Details
The XXE vulnerability in Apache Syncope is classified under CWE-611, which relates to improper restriction of XML External Entity reference. The vulnerability exists due to the application not adequately controlling the processing of XML input, allowing for potential exploitation through crafted XML payloads.
The CVSS 3.1 vector for this vulnerability is: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N. The attack vector is network-based, requiring high privileges to exploit, but does not require user interaction. The confidentiality impact is assessed as high, while integrity and availability impacts are rated as none.
Technical Analysis
The root cause of this vulnerability stems from the improper handling of XML data within the Apache Syncope Console. Specifically, by allowing administrators to input arbitrary XML content without adequate validation or restriction, the application opens itself to XXE attacks.
The attack vector for this vulnerability is network-based, allowing an attacker to exploit it remotely. The complexity of such an attack is low, as it only requires crafted XML input to trigger the vulnerability. High privileges are required to execute the attack, as the attacker must have administrative access to create or edit Keymaster parameters.
User interaction is not needed for this vulnerability to be exploited. The confidentiality impact is rated as high due to the potential leakage of sensitive data, while integrity and availability are unaffected.
Risk & Impact Analysis
The real-world risk posed by CVE-2026-23795 is significant, particularly for organizations relying on Apache Syncope for identity management. The potential for sensitive data leakage could lead to severe compliance and reputational repercussions.
In terms of deployment, organizations utilizing vulnerable versions of Apache Syncope should assess their exposure and the potential blast radius of this vulnerability. Given the confidentiality impact is high, organizations must address this vulnerability in their priority patch cycle.
Based on the CVSS score of 4.9, the urgency for remediation is classified as medium. Organizations should schedule remediation in line with their vulnerability management policies.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Apache Syncope are from 3.0 through 3.0.15 and from 4.0 through 4.0.3. Organizations should upgrade to version 3.0.16 or 4.0.4, which address this vulnerability.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to the patched versions of Apache Syncope, specifically 3.0.16 or 4.0.4. If immediate upgrading is not feasible, organizations should implement network controls to restrict access to the Apache Syncope Console.
Regular security assessments and penetration testing are recommended to identify similar vulnerabilities in the application. For comprehensive security, organizations may consider utilizing penetration testing services to validate the effectiveness of the applied controls.
Detection Guidance
Organizations should monitor logs for any unusual XML processing requests and analyze behavioral anomalies that may indicate attempts to exploit this vulnerability. Additionally, network signatures that capture unusual XML traffic may aid in early detection.
AppSecure Threat Intelligence Insight
The presence of CVE-2026-23795 underscores the importance of robust input validation mechanisms in applications that process XML. Security teams should take note of this pattern of vulnerabilities, as they often lead to significant data breaches if left unaddressed.
Organizations are encouraged to adopt a proactive approach to security that includes regular updates, comprehensive testing, and a focus on secure coding practices. For further insights, organizations can refer to resources on penetration testing methodology and vulnerability management program design to enhance their security posture.
Additionally, organizations may benefit from engaging in red teaming services to further assess their security frameworks and identify potential vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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