VulnerabilityDeferred

CVE-2025-8699

Some "Stored Value" Unattended Payment Solutions of KioSoft use vulnerable NFC cards.

CRITICAL 9.1EPSS 0.74%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Some "Stored Value" Unattended Payment Solutions of KioSoft use vulnerable NFC cards. Attackers could potentially use this vulnerability to change the balance on the cards and generate money. The account balance is stored on an insecure MiFare Classic NFC card and can be read and written back. By carefully observing changes in card dumps, one can identify fields that store the cash value of the card. Additionally, a checksum can be identified, which is created by XOR-ing the cash and an unknown field with a certain value. By updating the fields accordingly, arbitrary amounts of money can be loaded onto the card (up to $655,35) to pay for goods.

CVSS 3.1: 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.74% probability · 53th percentile
CISA KEV: Not listed
Weakness: CWE-922
Source: 551230f0-3615-47bd-b7cc-93e92e730bbf

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.