CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
99.0%
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.
Arbitrary local files can be attached to email messages.
Fixed in 5.2.22
Validate input before using user-supplied file paths.
https://nvd.nist.gov/vuln/detail/CVE-2017-5223
If you have any questions or comments about this advisory:
kalilinux.co/2017/01/12/phpmailer-cve-2017-5223-local-information-disclosure-vulnerability-analysis/
www.securityfocus.com/bid/95328
github.com/advisories/GHSA-4x5h-cr29-fhp6
github.com/FriendsOfPHP/security-advisories/blob/master/phpmailer/phpmailer/CVE-2017-5223.yaml
github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md
github.com/PHPMailer/PHPMailer/releases/tag/v5.2.22
github.com/PHPMailer/PHPMailer/security/advisories/GHSA-4x5h-cr29-fhp6
nvd.nist.gov/vuln/detail/CVE-2017-5223
www.exploit-db.com/exploits/43056/
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
99.0%