Vulnerability · Published May 26, 2025 · Assigned by CERT-PL

CVE-2025-4053Unauthorized creation of master key in Mifare Classic Be-Tech cards

Medium 6.8

In plain English

A medium-severity security flaw in Mifare Classic cards from Be-Tech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 4.0)6.8Medium

Exploit odds (30 days)0.2%top 95.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The data stored in Be-Tech Mifare Classic card is stored in cleartext. An attacker having access to a Be-Tech hotel guest Mifare Classic card can create a master key card that unlocks all the locks in the building. This issue affects all Be-Tech Mifare Classic card systems. To fix the vulnerability, it is necessary to replace the software, encoder, cards, and PCBs in the locks.

Affected products (as reported)

Vendor	Product	Versions
Be-Tech	Mifare Classic cards	0 – through *

Weakness: CWE-312 · Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://cert.pl/en/posts/2025/05/CVE-2025-4053/ third-party-advisory