How severe is CVE-2021-3850?

CVE-2021-3850 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2021-3850 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3850?

CVE-2021-3850 primarily affects Adodb Project Adodb. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3850?

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-2021-3850 published?

CVE-2021-3850 was published on 2022-01-25 and last updated on 2026-06-17.

CVE-2021-3850

CVE-2021-3850 is a critical-severity vulnerability in Adodb Project Adodb with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Adodb Project Adodb
Published: 2022-01-25
Last modified: 2026-06-17

Description

Authentication Bypass by Primary Weakness in GitHub repository adodb/adodb prior to 5.20.21.

Frequently asked questions

What is CVE-2021-3850?: Authentication Bypass by Primary Weakness in GitHub repository adodb/adodb prior to 5.20.21.
How severe is CVE-2021-3850?: CVE-2021-3850 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2021-3850 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3850?: CVE-2021-3850 primarily affects Adodb Project Adodb. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3850?: 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-2021-3850 published?: CVE-2021-3850 was published on 2022-01-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:adodb_project:adodb:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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