CVE-2026-81181 in SysReptor
Summary
by MITRE • 09/18/2026
SysReptor is a fully customizable pentest reporting platform. Prior to 2026.68, the password authentication flow for protected shared notes does not rotate the session identifier after successful authentication, allowing session fixation. An attacker who can obtain an unauthenticated SysReptor session cookie, place it in a victim's browser, and know the shared-note URL where the victim authenticates can reuse the fixed session after the victim enters the correct password and access that shared note. The main SysReptor login flow is not affected. This issue is fixed in version 2026.68.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in SysReptor prior to version 2026.68 represents a critical session management flaw specifically affecting the authentication mechanism for protected shared notes. As a fully customizable pentest reporting platform, SysReptor handles sensitive security assessment data, making the integrity of its access controls paramount. The core technical deficiency lies in the failure to rotate the session identifier upon successful user authentication within this specific workflow. In standard secure application design, when an unauthenticated client transitions to an authenticated state, the server must issue a new session token to prevent attackers from retaining control over the previously established session context. By omitting this rotation step for protected shared notes, SysReptor inadvertently allows an attacker who has obtained or predicted an initial session cookie to maintain that same identifier after the victim successfully logs in with their credentials.
This architectural oversight enables a classic session fixation attack vector. The operational impact is significant because it bypasses the need for credential theft through phishing or keylogging. Instead, an adversary can initiate a connection to SysReptor to generate a known session ID and then distribute this identifier via social engineering techniques such as embedding it in a malicious link sent to a target user. When the victim clicks the link containing the protected shared note URL and enters their valid password into the authentication form, the server accepts the credentials but retains the attacker-controlled session cookie rather than issuing a fresh one. Consequently, the attacker can immediately reuse this fixed session identifier to access the sensitive pentest report data that was just authenticated by the legitimate user. It is important to note that while this specific flow is compromised, the main SysReptor login interface remains unaffected and adheres to proper session rotation practices, limiting the scope of exploitation to shared resource access scenarios.
From a classification perspective, this vulnerability aligns with CWE-384, which describes Session Fixation as an attack where an attacker sets or knows the session ID of a victim before they authenticate. This flaw also maps directly to MITRE ATT&CK technique T1078, specifically under Valid Accounts and potentially Local Accounts if shared notes are accessed by internal team members, illustrating how pre-existing valid credentials can be hijacked through manipulation of the authentication state rather than compromise of the secrets themselves. The persistence of the session ID across the boundary between unauthenticated and authenticated states violates fundamental security principles regarding identity management and trust boundaries within web applications.
To mitigate this risk, organizations must upgrade to SysReptor version 2026.68 or later where the issue has been resolved by implementing proper session regeneration upon successful authentication for protected shared notes. In addition to applying vendor patches, administrators should enforce strict cookie security attributes such as HttpOnly and Secure flags to reduce exposure to cross-site scripting vectors that might facilitate initial session theft. Implementing short-lived session timeouts and requiring re-authentication for sensitive operations can further limit the window of opportunity for an attacker exploiting a fixed session. Regular audits of authentication flows against industry standards like OWASP Session Management Cheat Sheet will help ensure that similar flaws are not present in other parts of the application, maintaining the confidentiality and integrity of critical penetration testing reports stored within the platform.