CVE-2020-5402 json
UAA fails to check the state parameter when authenticating with external IDPs
published 2020-02-27 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26581
- cvss
- 8.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
In Cloud Foundry UAA, versions prior to 74.14.0, a CSRF vulnerability exists due to the OAuth2 state parameter not being checked in the callback function when authenticating with external identity providers.
Patch / fix
- Cloud Foundry UAA v74.14.0
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Cloud Foundry UAA
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
cloudfoundry.org
/blog/cve-2020-5402
vendor-advisory
Sources
- CVE List CVE-2020-5402
- NVD CVE-2020-5402
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