Rapid7 InsightVM versions before 8.34.0 contain a signature verification issue on the Assertion Consumer Service (ACS) cloud endpoint that could allow an attacker to gain unauthorized access to InsightVM accounts set up via 'Security Console' installations, resulting in full account takeover. The issue occurs due to the application processing these unsigned assertions and issuing session cookies that granted access to the targeted user accounts. This has been fixed in version 8.34.0 of InsightVM.
The severity level of this vulnerability is critical, with a CVSS score of 9.6, indicating significant risk to organizations. Attackers may leverage this vulnerability to fully compromise InsightVM accounts, leading to unauthorized access to sensitive data and potential further exploitation of the network.
Organizations should prioritize patching immediately to prevent unauthorized access. As of now, there are no known public exploits or proofs of concept for this vulnerability. However, the critical nature of this issue necessitates prompt remediation.
For those using vulnerable versions of Rapid7 InsightVM, it is crucial to upgrade to version 8.34.0 or later to mitigate this risk.
Vulnerability Details
This vulnerability allows an attacker to exploit weaknesses in the ACS cloud endpoint for InsightVM. The specific issues are classified under CWE-287 (Improper Authentication) and CWE-347 (Improper Verification of Cryptographic Signature).
The publication date for this vulnerability is February 3, 2026, and it remains in an 'Awaiting Analysis' status.
Technical Analysis
The root cause of this vulnerability is that the application processes unsigned assertions, issuing session cookies that allow unauthorized access. The attack vector is network-based, with low attack complexity and low privileges required to initiate the exploit. No user interaction is necessary for an attacker to execute this attack.
The impact on confidentiality and integrity is high, while availability is unaffected. This illustrates significant risk as attackers could potentially gain full control over the compromised accounts.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive data and potential lateral movement within the network. Given the critical CVSS score of 9.6, organizations must understand the urgency of addressing this vulnerability.
Organizations should address this vulnerability in their priority patch cycle, as failure to do so could expose them to significant security risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Rapid7 InsightVM prior to version 8.34.0 are affected by this vulnerability.
Mitigation & Remediation
Organizations should upgrade to version 8.34.0 or later to remediate this vulnerability. If an immediate update is not possible, consider implementing stricter access controls and monitoring to mitigate potential risks.
For further assistance and information on security testing, organizations can refer to our penetration testing services for comprehensive security assessments.
Detection Guidance
Organizations should monitor logs for unauthorized access attempts and review session management controls to detect potential exploitation of this vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of robust authentication mechanisms in cloud services. It serves as a reminder to continuously evaluate the security posture of deployed applications and implement necessary controls to prevent similar vulnerabilities in the future.
For more insights on security best practices, consider reviewing our articles on penetration testing methodology, vulnerability management program design, and API penetration testing for comprehensive understanding and preparedness.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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