How severe is CVE-2021-45491?

CVE-2021-45491 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-45491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45491?

CVE-2021-45491 affects 3cx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45491?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-45491 published?

CVE-2021-45491 was published on 2022-03-28 and last updated on 2026-06-17.

CVE-2021-45491

CVE-2021-45491 is a medium-severity vulnerability in 3cx with a CVSS 3.x base score of 6.5. 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-312.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: 3cx
Published: 2022-03-28
Last modified: 2026-06-17

Description

3CX System through 2022-03-17 stores cleartext passwords in a database.

Frequently asked questions

What is CVE-2021-45491?: 3CX System through 2022-03-17 stores cleartext passwords in a database.
How severe is CVE-2021-45491?: CVE-2021-45491 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-45491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45491?: CVE-2021-45491 affects 3cx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45491 published?: CVE-2021-45491 was published on 2022-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:3cx:3cx:*:*:*:*:*:*:*:*

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