Vulnerability in Unionpayintl Union Pay
CVE-2020-23533
Union Pay up to 1.2.0, for web based versions contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants' websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.dropbox.com/s/6smwnbrp0kgsgrc/poc_code.py (Third Party Advisory)
- www.dropbox.com/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt (Third Party Advisory)
- mobitec.ie.cuhk.edu.hk/cve_2020/ (Permissions Required)
- cwe.mitre.org/data/definitions/347.html (Technical Description)
Frequently asked questions
- What is CVE-2020-23533?
- CVE-2020-23533 is a high-severity vulnerability in Unionpayintl Union Pay, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2021-04-06.
- How severe is CVE-2020-23533?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-23533 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.