CVE-2025-8699
CRITICALDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 50% of all known CVEs.
References
Related Vulnerabilities
Other CWE-922 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-13937 | Medium | 5.3 | 78% | - | - |
| CVE-2018-25031 | Medium | 4.3 | 42% | - | Fix |
| CVE-2021-27170 | Critical | 9.8 | 16% | - | - |
| CVE-2023-41723 | Medium | 4.3 | 12% | - | - |
| CVE-2020-1493 | Medium | 5.5 | 7.3% | - | - |
| CVE-2024-30896 | Critical | 9.1 | 5.2% | - | - |
Common questions
How do I fix CVE-2025-8699?
No published fix for CVE-2025-8699 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2025-8699 being actively exploited?
Not that we know of. CVE-2025-8699 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.71% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.
How severe is CVE-2025-8699?
CVE-2025-8699 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.