CVE-2021-27931 is a critical vulnerability found in LumisXP, also known as the Lumis Experience Platform. Versions prior to 10.0.0 are affected, allowing unauthenticated blind XML External Entity (XXE) attacks through an API request to PageControllerXml.jsp. This vulnerability enables attackers to craft requests containing an XXE payload, potentially leading to severe outcomes such as the ability to read sensitive local server files or causing denial of service.
The CVSS score for this vulnerability is 9.1, categorizing it as critical. The high severity is attributed to the potential for significant data exposure and service disruption without requiring any form of authentication. Organizations utilizing LumisXP should recognize the urgency of this threat, as it poses a considerable risk to their information security.
Currently, there is no known exploit for this vulnerability, but it is crucial for defenders to take immediate action. The risk is elevated due to its potential impact on confidentiality and availability, making it imperative for organizations to prioritize patching their systems.
Organizations should prioritize patching immediately to secure their systems against this critical vulnerability.
Vulnerability Details
The vulnerability allows unauthenticated blind XXE via an API request to PageControllerXml.jsp. The affected version is LumisXP prior to 10.0.0. The official CVE description states that the vulnerability can lead to reading local server files or denial of service.
The CWE classification for this vulnerability is CWE-611, indicating a potential issue with XML External Entity processing.
With a CVSS score of 9.1, the severity is assessed as critical, highlighting the need for urgent remediation. Organizations using Lumis Experience Platform should ensure they upgrade to version 10.0.0 or later.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of XML input, allowing external entities to be processed. The attack vector is network-based, requiring low complexity and no privileges or user interaction for exploitation. This makes the vulnerability particularly dangerous.
The impact on confidentiality is high, as attackers can potentially read sensitive data from server files. There is no integrity impact, but availability can be compromised, leading to service outages.
Given the low attack complexity and lack of required privileges, organizations must take this risk seriously and implement necessary security measures.
Risk & Impact Analysis
The real-world risk associated with CVE-2021-27931 is substantial. Organizations using LumisXP could face severe data breaches and service disruptions if this vulnerability is exploited. The potential for unauthorized access to sensitive server files necessitates immediate attention.
The blast radius is considerable, given that an attacker could exploit this vulnerability to access critical information and disrupt services. This vulnerability should be prioritized due to its critical CVSS score and high potential for exploitation.
Organizations must act swiftly to mitigate risks associated with this vulnerability and ensure their systems are secure.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Lumis Experience Platform prior to 10.0.0 are affected by this vulnerability. Organizations should ensure they upgrade to the latest version to mitigate risks.
Mitigation & Remediation
Organizations must upgrade to Lumis Experience Platform version 10.0.0 or later to address this vulnerability. In cases where an immediate upgrade is not feasible, implement configuration hardening measures and monitor for suspicious API requests.
For ongoing security, organizations should consider employing penetration testing to assess their security posture.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual API request patterns and search for signs of unauthorized access to sensitive resources.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-27931 lies in the growing trend of XML External Entity vulnerabilities in web applications. Security teams should learn from this incident and strengthen their defenses against similar threats.
Engaging in proactive security measures, such as regular security assessments, is crucial. For further guidance on improving security practices, organizations can refer to resources like the vulnerability management program and the penetration testing methodology guides.
Organizations should also stay updated on security trends and evolving threats to maintain a robust security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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