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WordPress ACF Arbitrary File Upload RCE (CVE-2021-21310) Analysis and POC

github.com 2026-10-17 English translation pending; showing Chinese 查看中文 →

Security Advisory CVE-2021-21310 Critical Advanced Custom Fields

Affected:

Advanced Custom Fields 6.0.0
Advanced Custom Fields 6.0.10

Fixed in:

6.0.11

Referenced CVEs: CVE-2026-111610 · 5.4

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