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    CVE-2021-21332

    Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.27.0, the password reset endpoint served via Synapse was vulnerable to cross-site scripting (XSS) attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities, and access to other resources served on the same domain or parent domains. This is fixed in version 1.27.0.

    Published:Mar 26, 2021
    Last Modified:Nov 21, 2024
    EPS:Mar 26, 2021
    EPSS Score:0.00505
    CVSS Score:6.9

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Matrix
    Product
    Synapse

    Exploits

    No exploit reference

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    References

    https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df
    https://github.com/matrix-org/synapse/pull/9200
    https://github.com/matrix-org/synapse/releases/tag/v1.27.0
    https://github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/
    https://github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df
    https://github.com/matrix-org/synapse/pull/9200
    https://github.com/matrix-org/synapse/releases/tag/v1.27.0
    https://github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/

    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