CVE-2021-43834 Incorrect Authentication in elabftw
Attackers can authenticate as existing users in eLabFTW if LDAP or SAML is enabled, allowing unauthorized account access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43834?
CVE-2021-43834 is a critical authentication bypass vulnerability in elabftw, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2021-43834?
It affects 1 product.
Products include Elabftw Elabftw.
How do I fix CVE-2021-43834?
No fix has been published for CVE-2021-43834 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-43834 being exploited?
There is no known exploitation of CVE-2021-43834 in the wild and no public exploit code.
Other vulnerabilities in elabftw
- CVE-2024-28100 Stored Cross-site Scripting leading to arbitrary actions taken on behalf of users in elabftw
- CVE-2019-12185 File upload in n/a
- CVE-2024-25632 Unauthorised granting of administrator privileges over arbitrary teams under certain circumstances
- CVE-2025-25206 Incorrect input validation could allow an authenticated user to read sensitive information
- CVE-2021-43833 Account takeover in eLabFTW
Sources
Also known as GHSA-98rp-gx76-33ph.