External risk intelligence

Pangolin 2FA Privilege Escalation Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-56333

The vulnerability resides in the 2FA component of the Pangolin application. Authentication and identity portals, including those handling 2FA, are inherently designed to be public-facing services to verify users accessing protected resources from the internet.

Authentication Bypass

Pangolin

before 1.7.0

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

An unauthenticated privilege escalation vulnerability has been identified in a common authentication component used by various applications. This issue could allow unauthorized access to sensitive functions if the affected component is deployed. The primary concern is to confirm whether this specific component is in use within our environment.

Authentication bypass allows unauthorized access.
Critical component for identity and access management.
Verify use and assess potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by targeting the two-factor authentication (2FA) component of the Pangolin application. Since the vulnerability is accessible over the network and requires no prior privileges, an unauthenticated attacker could potentially gain elevated access to the system. This could lead to a complete compromise of the application's confidentiality, integrity, and availability.

Public network access required.
Triggered via the 2FA component.
Allows privilege escalation.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in the 2FA component of Pangolin could allow an unauthenticated remote attacker to escalate privileges. This could affect the integrity and availability of the system and its data.

System and user data integrity.
Privilege escalation via 2FA component.
Unauthorized system access and control.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts the Fossorial pangolin application, specifically its 2FA component. Responsibility for addressing this typically falls to the application owners who manage the pangolin deployments, in coordination with infrastructure or platform teams responsible for the underlying systems and security teams who monitor for external exposure. The immediate first step is to identify all instances of pangolin, confirm their reachability and criticality, and then engage the accountable owners to plan remediation efforts.

Application owners responsible for pangolin.
Verify public exposure and business criticality.
Plan and coordinate risk-based remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is the Fossorial pangolin software?

Pangolin is an application component built by Fossorial, specifically designed to handle authentication and identity management processes. It is widely used to verify user credentials and secure access to protected resources by providing integrated two-factor authentication (2FA) functionality within broader software environments.

What does CWE-287 mean for CVE-2025-56333?

CWE-287 refers to Improper Authentication. In the context of this vulnerability, it means the 2FA mechanism fails to correctly verify the identity of a user. An attacker can exploit this weakness to bypass standard security checks, allowing them to gain unauthorized, elevated privileges within the system without providing valid authentication credentials.

How is this pangolin vulnerability triggered?

An attacker triggers this flaw by interacting directly with the 2FA component over a network. The vulnerability does not require the attacker to have any prior user account or special permissions. Note that simply having the software installed is not the trigger; the attacker must be able to reach and communicate with the 2FA service endpoint to initiate the bypass.

Is my pangolin deployment at risk?

According to Halo Surface Signal, this vulnerability is highly relevant if your pangolin instance is internet-facing. Because 2FA components are intended to gatekeep access, they are frequently exposed to the public network, increasing the likelihood that an unauthorized user can reach the vulnerable code. You should prioritize instances accessible from the internet.

What steps should I take if I use pangolin?

First, conduct an inventory to locate all versions of pangolin running in your environment, focusing on those earlier than 1.7.0. Once identified, evaluate whether these instances are reachable via the network. Collaborate with your application owners to confirm the role of these instances and coordinate the necessary updates to a patched version to remediate the authentication flaw.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.