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    CVE-2026-25519

    OpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. Prior to version 4.2.29, OpenSlides supports local logins with username and password or an optionally configurable single sign on with SAML via an external IDP. For users synced to OpenSlides via an external IDP, there is an incorrect access control regarding the local login of these users. Users can successfully login using the local login form and the OpenSlides username of a SAML user and a trivial password. This password is valid for all SAML users. This issue has been patched in version 4.2.29.

    Published:Feb 4, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 4, 2026
    EPSS Score:0.0002
    CVSS Score:8.1

    Affected Products

    Vendor
    Openslides
    Product
    Openslides

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    Related CVEs

    CVE-2025-30345 (CVSS 3.5) — An issue was discovered in OpenSlides before 4.2.5. When creating new chats via the chat_group.create action, …
    CVE-2025-30342 (CVSS 5.4) — An XSS issue was discovered in OpenSlides before 4.2.5. When submitting descriptions such as Moderator Notes o…
    CVE-2025-30343 (CVSS 3) — A directory traversal issue was discovered in OpenSlides before 4.2.5. Files can be uploaded to OpenSlides mee…
    CVE-2025-30344 (CVSS 5.3) — An issue was discovered in OpenSlides before 4.2.5. During login at the /system/auth/login/ endpoint, the syst…
    CVE-2024-22892 (CVSS 7.5) — OpenSlides 4.0.15 was discovered to be using a weak hashing algorithm to store passwords.…
    CVE-2024-22893 (CVSS 7.5) — OpenSlides 4.0.15 verifies passwords by comparing password hashes using a function with content-dependent runt…
    CVE-2020-26280 (CVSS 8.9) — OpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda, motions, …

    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