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Fencer Vulns
critical 9.8

CVE-2021-43136 in the critical feed json

An authentication bypass issue in FormaLMS <= 2.4.4 allows an attacker to bypass the authentication mechanism and obtain a valid access to…

published 2021-11-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30085

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.7%
EPSS 15.7% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

An authentication bypass issue in FormaLMS <= 2.4.4 allows an attacker to bypass the authentication mechanism and obtain a valid access to the platform.

Timeline

  1. Published
  2. First public exploit (EDB-50513)

Exploit prediction

15.72% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-50513 FormaLMS 2.4.4 - Authentication Bypass webapps, 2021-11-11
  • blog.hacktivesecurity.com https://blog.hacktivesecurity.com/index.php/2021/10/05/cve-2021-43136-formalms-the-evil-default-value-that-leads-to-authentication-bypass/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/164930/FormaLMS-2.4.4-Authentication-Bypass.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.