Auth bypass in Aptsys Gemscms Backend
CVE-2025-52024
A vulnerability exists in the Aptsys POS Platform Web Services module thru 2025-05-28, which exposes internal API testing tools to unauthenticated users. By accessing specific URLs, an attacker is presented with a directory-style index listing all available backend services and POS web services, each with an HTML form for submitting test input. These panels are intended for developer use, but are accessible in production environments with no authentication or session validation. This grants any external actor the ability to discover, test, and execute API endpoints that perform critical functions including but not limited to user transaction retrieval, credit adjustments, POS actions, and internal data queries.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
Weakness classification (CWE)
References
- aptsys.com (Product)
- gist.github.com/ReverseThatApp/4a6be2b9b2ba39d38c35c8753e0afd39 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-52024?
- CVE-2025-52024 is a critical-severity vulnerability in Aptsys Gemscms Backend, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2026-01-23.
- How severe is CVE-2025-52024?
- Critical severity. CVSS v3 base score is 9.4 out of 10.