How severe is CVE-2021-43136?

CVE-2021-43136 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43136 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43136?

CVE-2021-43136 affects Formalms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43136?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-43136 published?

CVE-2021-43136 was published on 2021-11-10 and last updated on 2026-06-17.

CVE-2021-43136

CVE-2021-43136 is a critical-severity vulnerability in Formalms with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Formalms
Published: 2021-11-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-43136?: 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.
How severe is CVE-2021-43136?: CVE-2021-43136 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43136 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43136?: CVE-2021-43136 affects Formalms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43136?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-43136 published?: CVE-2021-43136 was published on 2021-11-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:formalms:formalms:*:*:*:*:*:*:*:*

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