CVE-2021-41171

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    CVE-2021-41171

    Published: 22 Oct 2021Last Modified: 20 Oct 2026

    Summary:

    Details: eLabFTW is an open source electronic lab notebook manager for research teams. In versions of eLabFTW before 4.1.0, it allows attackers to bypass a brute-force protection mechanism by using many different forged PHPSESSID values in HTTP Cookie header. This issue has been addressed by implementing brute force login protection, as recommended by Owasp with Device Cookies. This mechanism will not impact users and will effectively thwart any brute-force attempts at guessing passwords. The only correct way to address this is to upgrade to version 4.1.0. Adding rate limitation upstream of the eLabFTW service is of course a valid option, with or without upgrading.

    References: https://github.com/elabftw/elabftw/releases/tag/4.1.0, https://github.com/elabftw/elabftw/security/advisories/GHSA-q67h-5pc3-g6jv, https://owasp.org/www-community/Slow_Down_Online_Guessing_Attacks_with_Device_Cookies, https://github.com/elabftw/elabftw/commit/8e92afeec4c3a68dc88333881b7e6307f425706b, https://www.exploit-db.com/docs/50436

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -d479eb32b84e6e813a4143e95d860f955fa243aa

    Affected versions

    4.0.11
    4.0.10
    4.0.9
    4.0.8
    4.0.7
    4.0.6
    4.0.5
    4.0.4
    4.0.3
    4.0.2
    4.0.1
    4.0.0
    4.0.0-beta6
    4.0.0-beta5
    4.0.0-beta4
    4.0.0-beta3
    4.0.0-beta2
    4.0.0-beta
    4.0.0-alpha2
    4.0.0-alpha

    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-2021-41171 | CVE-DB