CVE-2023-6621

    Dashboard / Vulnerabilities / CVE-2023-6621

    CVE-2023-6621

    Published: 3 Jan 2024Last Modified: 28 Oct 2026

    Summary: Post SMTP < 2.8.7 - Reflected Cross-Site Scripting

    Details: The POST SMTP WordPress plugin before 2.8.7 does not sanitise and escape the msg parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

    References: https://wordpress.org/plugins, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6621.json, https://nvd.nist.gov/vuln/detail/CVE-2023-6621, https://wpscan.com/vulnerability/b49ca336-5bc2-4d72-a9a5-b8c020057928

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -437956ad80f774c66350ad620f75262cd50ebc34

    Affected versions

    2.5.9-beta.1
    2.5.9.4
    2.5.9.3
    2.5.8
    2.5.7
    2.5.6
    2.5.5
    2.5.4
    2.5.3
    2.5.2
    2.5.1
    2.5.0

    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
    CVE-2023-6621 | CVE-DB