Security fix: replace insecure SHA-1/MD5 hash functions with SHA-256#224
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oleksandr-mykhailenko merged 2 commits intoJul 17, 2026
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sha1() and md5() are cryptographically weak. Replace usages in the
Mailgun API hash param, the multipart boundary generator, and the
widget ID generator with hash('sha256', ...).
Document the SHA-1/MD5 to SHA-256 security fix in CHANGELOG.md, readme.md, and readme.txt, and bump the plugin version accordingly.
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sha1() and md5() are cryptographically weak. Replace usages in the Mailgun API hash param, the multipart boundary generator, and the widget ID generator with hash('sha256', ...).