CVE-2021-20866 json
Advanced Custom Fields versions prior to 5.11 and Advanced Custom Fields Pro versions prior to 5.11 contain a missing authorization vulnera…
published 2021-12-13 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8275
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
Advanced Custom Fields versions prior to 5.11 and Advanced Custom Fields Pro versions prior to 5.11 contain a missing authorization vulnerability in obtaining the user list which may allow a user to obtain the unauthorized information via unspecified vectors.
Patch / fix
- advancedcustomfields advanced_custom_fields 5.11
Exploit prediction
1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
Affected products
- Delicious Brains Advanced Custom Fields and Advanced Custom Fields Pro
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
advancedcustomfields.com
/
vendor-advisory
-
wordpress.org
/plugins/advanced-custom-fields/
third-party-advisory
-
jvn.jp
/en/jp/JVN09136401/index.html
third-party-advisory
Sources
- CVE List CVE-2021-20866
- NVD CVE-2021-20866
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