CVE-2020-36285 json
Union Pay up to 3.3.12, for iOS mobile apps, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows att…
published 2021-04-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23827
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
Union Pay up to 3.3.12, for iOS mobile apps, 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.
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
dropbox.com
/s/6smwnbrp0kgsgrc/poc_code.py?dl=0
third-party-advisory
-
dropbox.com
/s/czbkdr73tclq2nr/UnionPay_Vulnerability_Report.txt?dl=0
third-party-advisory
-
mobitec.ie.cuhk.edu.hk
/cve_2020/
permissions-required
Sources
- CVE List CVE-2020-36285
- NVD CVE-2020-36285
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