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    CVE-2020-36326

    PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar Deserialization via addAttachment with a UNC pathname. NOTE: this is similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality problem in which UNC pathnames were always considered unreadable by PHPMailer, even in safe contexts. As an unintended side effect, this fix eliminated the code that blocked addAttachment exploitation.

    Published:Apr 28, 2021
    Last Modified:Nov 21, 2024
    EPS:Apr 28, 2021
    EPSS Score:0.01809
    CVSS Score:9.8

    Affected Products

    Vendor
    Phpmailer Project
    Product
    Phpmailer
    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

    Related CVEs

    CVE-2021-3603 (CVSS 8.1) — PHPMailer 6.4.1 and earlier contain a vulnerability that can result in untrusted code being called (if such co…
    CVE-2021-34551 (CVSS 8.1) — PHPMailer before 6.5.0 on Windows allows remote code execution if lang_path is untrusted data and has a UNC pa…
    CVE-2020-13625 (CVSS 7.5) — PHPMailer before 6.1.6 contains an output escaping bug when the name of a file attachment contains a double qu…
    CVE-2018-19296 (CVSS 8.8) — PHPMailer before 5.2.27 and 6.x before 6.0.6 is vulnerable to an object injection attack.…
    CVE-2017-11503 (CVSS 6.1) — PHPMailer 5.2.23 has XSS in the "From Email Address" and "To Email Address" fields of code_generator.php.…
    CVE-2017-5223 (CVSS 5.5) — An issue was discovered in PHPMailer before 5.2.22. PHPMailer's msgHTML method applies transformations to an H…
    CVE-2016-10033 (CVSS 9.8) — The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass …
    CVE-2016-10045 (CVSS 9.8) — The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the m…
    CVE-2015-8476 (CVSS 5) — Multiple CRLF injection vulnerabilities in PHPMailer before 5.2.14 allow attackers to inject arbitrary SMTP co…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High