Live Exposure Defense: From CVE to Confirmed Exposure in 12 Hours – See more

Back
New CVE Detected

CVE-2026-54600 – Unauthenticated Database Replacement / Admin Account Takeover – Wallos ≤ 4.9.3

Be the first to know when new zero-days emerge:

Subscribe to Email Alerts
Subscribe to RSS Feed

Summary

CVE-2026-54600 is an improper authentication vulnerability (CWE-287) in Wallos, an open-source self-hosted subscription tracker, affecting the database import endpoint. Versions up to and including 4.9.3 allow an unauthenticated attacker to fully replace the application’s database on a fresh/unconfigured installation, leading to complete compromise of the instance including establishment of admin access. The issue carries a HIGH severity score of 8.2.

Technical details

  • Root cause: endpoints/db/import.php does not authenticate callers; it sets $userId = 0 and gates access only on whether the internal user table is currently empty, rather than verifying a valid session or credentials.
  • Trigger condition: exploitable on installations that have not yet had an admin account created (fresh/unconfigured deployments), where the user table row count is zero.
  • Attack vector: over the network, an attacker crafts a malicious database file, packages it as a ZIP archive, and sends an unauthenticated POST request to the import endpoint.
  • Impact: the entire production database can be replaced, allowing the attacker to establish administrative access to the application. Impact is limited to integrity (no confidentiality or availability impact per the scoring).

Affected software

  • Wallos versions up to and including 4.9.3
  • Fixed in Wallos version 4.9.4

Severity

  • CVSS score: 8.2 (High)
  • CVSS v4.0 vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: upgrade to Wallos version 4.9.4 or later, which adds token-gated authentication to the database import functionality.
  • If patching is not immediately possible: complete initial admin account setup on any newly deployed Wallos instance as soon as it is exposed to the network, and restrict network access to the application (e.g., via firewall or VPN) until it is fully configured and patched.

References

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report

How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
Close

Subscribe to Threat Center RSS

Copy/paste the link below into your preferred RSS reader or follow these instructions to subscribe to Slack alerts.

Open RSS feedSlack setup instructions

Close

Get Real-Time CVE Alerts to Your Email

Be the first to know when new zero-days emerge