CVE-2026-111329 in JuggleIM
Summary
by MITRE • 10/16/2026
JuggleIM im-server through 1.8.16 ships default administrator credentials admin/123456 that allow unauthenticated remote attackers to access the admin console on port 8090. Attackers can log in as administrator, even after account deletion since CheckLogin recreates it, to control tenant applications and app secrets.
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified in JuggleIM im-server versions up to 1.8.16 represents a critical failure in secure configuration management, specifically involving the presence of hardcoded default administrative credentials. The system ships with an administrator account utilizing the username admin and password 123456 by default. This practice violates fundamental security principles regarding credential hygiene and is classified under CWE-798: Use of Hard-coded Credentials. By retaining these predictable access keys in production-ready builds, the software exposes a significant attack surface that allows unauthenticated remote attackers to gain immediate administrative control over the application infrastructure without needing to exploit complex logic flaws or perform brute-force attacks against strong password policies.
The operational impact of this vulnerability is severe due to the specific architecture and behavior of the JuggleIM im-server authentication mechanism. Attackers can access the admin console via port 8090, which serves as the management interface for tenant applications and app secrets. The severity is compounded by a persistent state issue within the CheckLogin function. Even if an administrator attempts to mitigate the risk by deleting the default account through standard administrative procedures, the system's logic automatically recreates this account upon subsequent login checks or service restarts. This self-healing mechanism for insecure defaults ensures that the vulnerability remains exploitable indefinitely unless explicitly addressed at the code level or via configuration overrides that are not documented as effective against this specific behavior.
From a tactical perspective, this flaw aligns with MITRE ATT&CK technique T1078: Valid Accounts, specifically within the context of Default Accounts. An adversary leveraging this vulnerability can achieve initial access and subsequently escalate privileges to full system control. Once inside, the attacker gains the ability to manipulate tenant applications, potentially leading to data exfiltration, service disruption, or further lateral movement within a multi-tenant environment where app secrets are managed centrally. The exposure of these credentials effectively bypasses all intended authentication controls, rendering any other security measures implemented at the application layer ineffective against direct administrative access attempts on port 8090.
Mitigation strategies must focus on immediate remediation and long-term secure configuration practices. For existing deployments running version 1.8.16 or earlier, it is imperative to upgrade to a patched version where this default credential behavior has been removed or randomized at build time. If upgrading is not immediately feasible, administrators should attempt to disable the admin console port if network segmentation allows, although given the recreation logic in CheckLogin, configuration changes may need to be applied via environment variables or external authentication providers that bypass the internal hardcoded check entirely. Future development cycles must enforce CWE-798 compliance by ensuring no default credentials are shipped with software and implementing robust account lifecycle management that does not automatically recreate deleted administrative users unless explicitly authorized through secure, audited processes.