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CVE-2021-43833

27
FAUCET Score

CVE-2021-43833 is a high-severity vulnerability affecting eLabFTW versions prior to 4.2.0, allowing any authenticated user to gain unauthorized access to arbitrary accounts by manipulating email addresses. This flaw has a CVSS score of 8.8, indicating a network-based attack with low complexity and potential for high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, immediate patching to version 4.2.0 or enabling an email domain allowlist is recommended to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.2.0CPE matchmatch criteria
cpe:2.3:a:elabftw:elabftw:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 47th percentile among its peer group of 17,822 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / elabftw/elabftw/releases/tag/4.2.0
Release NotesThird Party Advisory
github.com / elabftw/elabftw/security/advisories/GHSA-v659-q2fh-v99w
Third Party Advisory