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    CVE-2026-23721

    OpenProject is an open-source, web-based project management software. When using groups in OpenProject to manage users, the group members should only be visible to users that have the View Members permission in any project that the group is also a member of. Prior to versions 17.0.1 and 16.6.5, due to a failed permission check, if a user had the View Members permission in any project, they could enumerate all Groups and view which other users are part of the group. The issue has been fixed in OpenProject 17.0.1 and 16.6.5. No known workarounds are available.

    Published:Jan 19, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 19, 2026
    EPSS Score:0.0004
    CVSS Score:4.3

    Affected Products

    Vendor
    Openproject
    Product
    Openproject

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

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    CVE-2026-32703 (CVSS 9) — OpenProject is an open-source, web-based project management software. In versions prior to 16.6.9, 17.0.6, 17.…
    CVE-2026-32698 (CVSS 9.1) — OpenProject is an open-source, web-based project management software. Versions prior to 16.6.9, 17.0.6, 17.1.3…
    CVE-2026-31974 (CVSS 3) — OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test e…
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    CVE-2026-30236 (CVSS 4.3) — OpenProject is an open-source, web-based project management software. Prior to 17.2.0, when editing a project …
    CVE-2026-30235 (CVSS 6.5) — OpenProject is an open-source, web-based project management software. Prior to 17.2.0, this vulnerability occu…
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    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