CVE-2021-43834— Incorrect Authentication in elabftw
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I. Basic Information for CVE-2021-43834
Vulnerability Information
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Vulnerability Title
Incorrect Authentication in elabftw
Source: NVD (National Vulnerability Database)
Vulnerability Description
eLabFTW is an electronic lab notebook manager for research teams. In versions prior to 4.2.0 there is a vulnerability which allows an attacker to authenticate as an existing user, if that user was created using a single sign-on authentication option such as LDAP or SAML. It impacts instances where LDAP or SAML is used for authentication instead of the (default) local password mechanism. Users should upgrade to at least version 4.2.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Elabftw 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elabftw是一套开源的实验数据托管平台。该平台运行于Linux系统中，并支持存储多种对象。 eLabFTW存在授权问题漏洞，该漏洞允许攻击者可利用该漏洞身份验证为现有用户。它影响使用LDAP或SAML而不是(默认)本地密码机制进行身份验证的实例。用户至少应该升级到4.2.0版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-43834
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- https://github.com/elabftw/elabftw/security/advisories/GHSA-98rp-gx76-33phx_refsource_CONFIRM
- https://github.com/elabftw/elabftw/releases/tag/4.2.0x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-43834
IV. Related Vulnerabilities
Same product: elabftw
- CVE-2026-28510
elabftw allows MFA bypass during login - CVE-2025-62793
eLabFTW HTML / CSS Injection via Malicious SVG Upload Leads - CVE-2025-25206
Incorrect input validation could allow an authenticated user - CVE-2024-52586
eLabFTW MFA bypass - CVE-2024-47826
eLabFTW vulnerable to HTML Injection in extended search erro
Same vendor: elabftw
- CVE-2026-28510
elabftw allows MFA bypass during login - CVE-2025-62793
eLabFTW HTML / CSS Injection via Malicious SVG Upload Leads - CVE-2025-25206
Incorrect input validation could allow an authenticated user - CVE-2024-52586
eLabFTW MFA bypass - CVE-2024-47826
eLabFTW vulnerable to HTML Injection in extended search erro
Same weakness: CWE-287
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