Cyber Resilience

CVE-2024-27455

Published
26 February 2024
Modified
17 June 2026
CVSS Score v3.1 9.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0065 48th percentile
Risk Priority 68 floored blend · peak EPSS

Summary

CVE-2024-27455 is a critical-severity Exposure of Data Element to Wrong Session (CWE-488) vulnerability in Bentley ALIM Web (inferred from references). Its CVSS base score is 9.1 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Browser Session Hijacking (T1185); ranked at the 48th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-12 (Session Termination) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

In the Bentley ALIM Web application, certain configuration settings can cause exposure of a user's ALIM session token when the user attempts to download files. This is fixed in Assetwise ALIM Web 23.00.04.04 and Assetwise Information Integrity Server 23.00.02.03.

CWE(s)
CWE-488CWE-613

Related Threats

MITRE ATT&CK Enterprise Techniques

T1185 Browser Session Hijacking Collection
Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.
attack.mitre.org →
T1550 Use Alternate Authentication Material Lateral Movement
Adversaries may use alternate authentication material, such as password hashes, Kerberos tickets, and application access tokens, in order to move laterally within an environment and bypass normal system access controls.
attack.mitre.org →
T1550.004 Web Session Cookie Lateral Movement
Adversaries can use stolen session cookies to authenticate to web applications and services.
attack.mitre.org →
T1563 Remote Service Session Hijacking Lateral Movement
Adversaries may take control of preexisting sessions with remote services to move laterally in an environment.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

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Affected Assets

Bentley
ALIM Web
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

AC-12 Session Termination good match

AC-12 directly requires automatic session termination after a defined period, structurally preventing reuse of expired session identifiers.

AC-3 Access Enforcement good match

AC-3 enforces access decisions that can be scoped to the correct session context.

AC-4 Information Flow Enforcement good match

AC-4 controls information flows between entities, reducing cross-session leakage.

SC-4 Information in Shared System Resources good match

SC-4 directly stops unintended transfer of data through shared resources that different sessions may access.

SC-39 Process Isolation partial match

SC-39 isolates execution domains so one session cannot reach another's state or data.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 mostly match
prevents

Credential lifecycle management directly includes enforcing session expiration to prevent reuse.

PR.AA-05 mostly match
prevents

Authorization policy enforcement and review covers terminating stale sessions to limit access scope.

PR.AA-03 partial match
prevents

Authentication mechanisms can incorporate session timeout checks but do not inherently address expiration policy.

PR.DS-10 partial match
prevents

Protecting data-in-use directly addresses runtime leakage of session data to unauthorized contexts.

PR.IR-01 partial match
prevents

Logical access controls and segmentation can be applied to isolate session state within applications or environments.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect the weakness but does not itself implement the preventive control.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle practices include session-management controls that prevent exposure of data to the wrong session.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for proper session isolation and state management.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture principles require isolation of session state to avoid cross-session data leakage.

A.8.28 Secure coding partial match
prevents

Secure coding standards mandate correct session handling to prevent exposure of data elements to the wrong session.

A.8.3 Information access restriction partial match
mitigates

Information access restriction directly enforces session boundaries so data is not exposed to the wrong session.

References