Sourced from phpmailer/phpmailer's releases.

PHPMailer 6.5.0

This is a security release.

• SECURITY Fixes CVE-2021-34551, a complex RCE affecting Windows hosts. See https://github.com/PHPMailer/PHPMailer/blob/HEAD/SECURITY.md for details.
• The fix for this issue changes the way that language files are loaded. While they remain in the same PHP-like format, they are processed as plain text, and any code in them will not be run, including operations such as concatenation using the . operator.
• Deprecation The current translation file format using PHP arrays is now deprecated; the next major version will introduce a new format.
• SECURITY Fixes CVE-2021-3603 that may permit untrusted code to be run from an address validator. See https://github.com/PHPMailer/PHPMailer/blob/HEAD/SECURITY.md for details.
• The fix for this issue includes a minor BC break: callables injected into validateAddress, or indirectly through the $validator class property, may no longer be simple strings. If you want to inject your own validator, provide a closure instead of a function name.
• Haraka message ID strings are now recognised

Thanks to Vikrant Singh Chauhan, listensec.com, and the WordPress security team for reporting and assistance with this release.

PHPMailer 6.4.1

This is a security release.

• SECURITY Fixes CVE-2020-36326, a regression of CVE-2018-19296 object injection introduced in 6.1.8, see SECURITY.md for details
• Reject more file paths that look like URLs, matching RFC3986 spec, blocking URLS using schemes such as ssh2
• Ensure method signature consistency in doCallback calls
• Ukrainian language update
• Add composer scripts for checking coding standards and running tests

Thanks to Fariskhi Vidyan for the report and assistance, and Tidelift for support.

PHPMailer 6.4.0

This is a maintenance release. The changes introduced in 6.3.0 for setting an envelope sender automatically when using mail() caused problems, especially in WordPress, so this change has been reverted. It gets a minor version bump as it's a change in behaviour, but only back to what 6.2.0 did. See #2298 for more info.

Other changes:

• Check for the mbstring extension before decoding addresss in parseAddress, so it won't fail if you don't have it installed
• Add Serbian Latin translation (sr_latn)
• Enrol PHPMailer in Tidelift, because supporting open-source is important!

PHPMailer 6.3.0

This is a maintenance release.

• Handle early connection errors such as 421 during connection and EHLO states
• Switch to Github Actions for CI
• Generate debug output for mail(), sendmail, and qmail transports. Enable using the same mechanism as for SMTP: set SMTPDebug > 0
• Make the mail() and sendmail transports set the envelope sender the same way as SMTP does, i.e. use whatever From is set to, only falling back to the sendmail_from php.ini setting if From is unset. This avoids errors from the mail() function if Sender is not set explicitly and php.ini is not configured. This is a minor functionality change, so bumps the minor version number.
• Extend parseAddresses to decode encoded names, improve tests

PHPMailer 6.2.0

This is a maintenance release. With this release, PHPMailer gains official PHP 8 compatibility; earlier versions worked in PHP 8 pre-releases, but the test suite did not. The considerable rework this required (which also restored tests running on older PHP versions) was done by @​jrfnl – thank you very much!

• PHP 8.0 compatibility
• Switch from PHP CS Fixer to PHP CodeSniffer for coding standards
• Create class constants for the debug levels in the POP3 class
• Improve French, Slovenian, and Ukrainian translations
• Improve file upload examples so file extensions are retained
• Resolve PHP 8 line break issues due to a very old PHP bug being fixed

... (truncated)

Sourced from phpmailer/phpmailer's changelog.

Version 6.5.0 (June 16th, 2021)

• SECURITY Fixes CVE-2021-34551, a complex RCE affecting Windows hosts. See https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md for details.
• The fix for this issue changes the way that language files are loaded. While they remain in the same PHP-like format, they are processed as plain text, and any code in them will not be run, including operations such as concatenation using the . operator.
• Deprecation The current translation file format using PHP arrays is now deprecated; the next major version will introduce a new format.
• SECURITY Fixes CVE-2021-3603 that may permit untrusted code to be run from an address validator. See https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md for details.
• The fix for this issue includes a minor BC break: callables injected into validateAddress, or indirectly through the $validator class property, may no longer be simple strings. If you want to inject your own validator, provide a closure instead of a function name.
• Haraka message ID strings are now recognised

Version 6.4.1 (April 29th, 2021)

• SECURITY Fixes CVE-2020-36326, a regression of CVE-2018-19296 object injection introduced in 6.1.8, see SECURITY.md for details
• Reject more file paths that look like URLs, matching RFC3986 spec, blocking URLS using schemes such as ssh2
• Ensure method signature consistency in doCallback calls
• Ukrainian language update
• Add composer scripts for checking coding standards and running tests

Version 6.4.0 (March 31st, 2021)

• Revert change that made the mail() and sendmail transports set the envelope sender if one isn't explicitly provided, as it causes problems described in PHPMailer/PHPMailer#2298
• Check for mbstring extension before decoding addresss in parseAddress
• Add Serbian Latin translation (sr_latn)
• Enrol PHPMailer in Tidelift

Version 6.3.0 (February 19th, 2021)

• Handle early connection errors such as 421 during connection and EHLO states
• Switch to Github Actions for CI
• Generate debug output for mail(), sendmail, and qmail transports. Enable using the same mechanism as for SMTP: set SMTPDebug > 0
• Make the mail() and sendmail transports set the envelope sender the same way as SMTP does, i.e. use whatever From is set to, only falling back to the sendmail_from php.ini setting if From is unset. This avoids errors from the mail() function if Sender is not set explicitly and php.ini is not configured. This is a minor functionality change, so bumps the minor version number.
• Extend parseAddresses to decode encoded names, improve tests

Version 6.2.0

• PHP 8.0 compatibility, many thanks to @​jrf_nl!
• Switch from PHP CS Fixer to PHP CodeSniffer for coding standards
• Create class constants for the debug levels in the POP3 class
• Improve French, Slovenian, and Ukrainian translations
• Improve file upload examples so file extensions are retained
• Resolve PHP 8 line break issues due to a very old PHP bug being fixed
• Avoid warnings when using old openssl functions
• Improve Travis-CI build configuration

Version 6.1.8 (October 9th, 2020)

• Mark ext-hash as required in composer.json. This has long been required, but now it will cause an error at install time rather than runtime, making it easier to diagnose
• Make file upload examples safer
• Update links to SMTP testing servers
• Avoid errors when set_time_limit is disabled (you need better hosting!)
• Allow overriding auth settings for local tests; makes it easy to run tests using HELO
• Recover gracefully from errors during keepalive sessions
• Add AVIF MIME type mapping
• Prevent duplicate To headers in BCC-only messages when using mail()
• Avoid file function problems when attaching files from Windows UNC paths
• Improve German, Bahasa Indonesian, Filipino translations
• Add Javascript-based example

... (truncated)

• a5b5c43 Changelog
• e121da3 Merge branch 'master' of https://github.com/PHPMailer/PHPMailer
• 74e512a Security update
• acd264b Merge branch 'CVE-2021-34551'
• 0063f83 Changelog
• 707205f Changelog
• 1047838 Changelog
• c2f191b Changelog
• 45f3c18 Deny string-based callables altogether
• 6334bab CVE docs
• Additional commits viewable in compare view

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