Critical
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-43834
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:22 UTC · Revision 1
Source evidence
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.
osv:CVE-2021-43834
Complete source record
{
"id": "ffa05618ee681a4e694e31489330b52cc4131a93bb25f61b04743fe62a15af8c",
"url": "https://osv.dev/vulnerability/CVE-2021-43834",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-43834",
"summary": "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.",
"evidence": "osv:CVE-2021-43834",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-43834",
"aliases": [
"CVE-2021-43834",
"GHSA-98rp-gx76-33ph"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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"repo": "https://github.com/elabftw/elabftw",
"type": "GIT",
"events": [
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},
{
"fixed": "061b57af9d761358ca3e87c63745644376b62193"
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"range": [
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"source": "CPE_RANGE"
},
{
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"source": "REFERENCES_TAG",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43834.json"
}
}
],
"modified": "2026-10-20T10:54:09.094200791Z",
"provider": "osv",
"references": [
"https://github.com/elabftw/elabftw/releases/tag/4.2.0",
"https://github.com/elabftw/elabftw/security/advisories/GHSA-98rp-gx76-33ph"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-43834",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384903,
"published_at": "2021-12-16T00:15:07.507+00:00"
}