How severe is CVE-2021-43145?

CVE-2021-43145 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-43145 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43145?

CVE-2021-43145 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43145?

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

When was CVE-2021-43145 published?

CVE-2021-43145 was published on 2022-02-04 and last updated on 2026-06-17.

CVE-2021-43145

CVE-2021-43145 is a high-severity vulnerability in Zammad with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zammad
Published: 2022-02-04
Last modified: 2026-06-17

Description

With certain LDAP configurations, Zammad 5.0.1 was found to be vulnerable to unauthorized access with existing user accounts.

Frequently asked questions

What is CVE-2021-43145?: With certain LDAP configurations, Zammad 5.0.1 was found to be vulnerable to unauthorized access with existing user accounts.
How severe is CVE-2021-43145?: CVE-2021-43145 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-43145 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43145?: CVE-2021-43145 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43145?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43145 published?: CVE-2021-43145 was published on 2022-02-04 and last updated on 2026-06-17.

References

https://zammad.com/de/advisories/zaa-2021-20

Affected products (1)

cpe:2.3:a:zammad:zammad:5.0.1:*:*:*:*:*:*:*

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