What is CVE-2021-43834?

CVE-2021-43834 is a critical-severity vulnerability in Elabftw, classified under Improper Authentication. CVSS score: 9.1/10. Published 2021-12-16.

How severe is CVE-2021-43834?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Elabftw

CVE-2021-43834

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.

Vulnerability class: Broken Authentication

EPSS: 0.010 (58.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Elabftw — versions < 4.2.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43834?: CVE-2021-43834 is a critical-severity vulnerability in Elabftw, classified under Improper Authentication. CVSS score: 9.1/10. Published 2021-12-16.
How severe is CVE-2021-43834?: Critical severity. CVSS v3 base score is 9.1 out of 10.