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cnvd-2017-00449

EUVD-2026-73158

fkie_cve-2017-5223

An issue was discovered in PHPMailer before 5.2.22. PHPMailer's msgHTML method applies transformations to an HTML document to make it usable as an email message body. One of the transformations is to convert relative image URLs into attachments using a script-provided base directory. If no base directory is provided, it resolves to /, meaning that relative image URLs get treated as absolute local file paths and added as attachments. To form a remote vulnerability, the msgHTML method must be called, passed an unfiltered, user-supplied HTML document, and must not set a base directory.

GHSA-4x5h-cr29-fhp6 — Local file disclosure in PHPMailer

Affected: Packagist: phpmailer/phpmailer

An issue was discovered in PHPMailer before 5.2.22. PHPMailer's `msgHTML` method applies transformations to an HTML document to make it usable as an email message body. One of the transformations is to convert relative image URLs into attachments using a script-provided base directory. If no base directory is provided, it resolves to `/`, meaning that relative image URLs get treated as absolute local file paths and added as attachments. To form a remote vulnerability, the msgHTML method must be called, passed an unfiltered, user-supplied HTML document, and must not set a base directory.

### Impact Arbitrary local files can be attached to email messages.

### Patches Fixed in 5.2.22

### Workarounds Validate input before using user-supplied file paths.

### References https://nvd.nist.gov/vuln/detail/CVE-2017-5223

### For more information If you have any questions or comments about this advisory: * Open a private issue in [the PHPMailer project](https://github.com/PHPMailer/PHPMailer)

gsd-2017-5223

UBUNTU-CVE-2017-5223

Affected: Ubuntu:Pro:16.04:LTS: libphp-phpmailer