CVE-2025-52026

High

Published: 23 January 2026

Published

23 January 2026

Modified

12 February 2026

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score 0.0002 3.9th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-52026 is a high-severity Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) vulnerability in Aptsys Gemscms Backend. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 3.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and IA-5 (Authenticator Management).

Deeper analysis

An information disclosure vulnerability, tracked as CVE-2025-52026, affects the /srvs/membersrv/getCashiers endpoint in the Aptsys gemscms backend platform through version 2025-05-28. This unauthenticated endpoint exposes a list of cashier accounts, including names, email addresses, usernames, and passwords hashed with MD5. As MD5 is a broken cryptographic hash function vulnerable to CWE-327, the hashes can be readily reversed to plaintext using public tools, leading to CWE-200 information disclosure. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Remote attackers require no privileges or user interaction to exploit this vulnerability over the network. By sending a request to the exposed endpoint, they can retrieve the full list of cashier credentials in hashed form, crack the MD5 hashes offline, and then perform unauthorized logins using the recovered plaintext passwords, usernames, and associated details. Successful exploitation enables attackers to impersonate cashiers and potentially access sensitive point-of-sale (POS) operations or backend administrative functions.

Mitigation details and advisories are referenced on the vendor site at http://aptsys.com, along with a GitHub Gist at https://gist.github.com/ReverseThatApp/4a6be2b9b2ba39d38c35c8753e0afd39 that likely contains proof-of-concept information or reversal tools. Security practitioners should check these resources for patches, version upgrades beyond 2025-05-28, or endpoint access controls.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-4223

Vulnerability details

An information disclosure vulnerability exists in the /srvs/membersrv/getCashiers endpoint of the Aptsys gemscms backend platform thru 2025-05-28. This unauthenticated endpoint returns a list of cashier accounts, including names, email addresses, usernames, and passwords hashed using MD5. As MD5 is a…

broken cryptographic function, the hashes can be easily reversed using public tools, exposing user credentials in plaintext. This allows remote attackers to perform unauthorized logins and potentially gain access to sensitive POS operations or backend functions.

CWE(s): CWE-200 CWE-327

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1552 Unsecured Credentials Credential Access

Adversaries may search compromised systems to find and obtain insecurely stored credentials.

attack.mitre.org →

T1087 Account Discovery Discovery

Adversaries may attempt to get a listing of valid accounts, usernames, or email addresses on a system or within a compromised environment.

attack.mitre.org →

Why these techniques?

Unauthenticated public endpoint disclosure of accounts and crackable MD5 credentials directly enables exploitation of public-facing app (T1190), unsecured credential exposure (T1552), and account discovery (T1087).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1