How severe is CVE-2021-42093?

CVE-2021-42093 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-42093 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42093?

CVE-2021-42093 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42093?

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-2021-42093 published?

CVE-2021-42093 was published on 2021-10-07 and last updated on 2026-06-17.

CVE-2021-42093

CVE-2021-42093 is a high-severity vulnerability in Zammad with a CVSS 3.x base score of 7.2. 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 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zammad
Published: 2021-10-07
Last modified: 2026-06-17

Description

An issue was discovered in Zammad before 4.1.1. An admin can execute code on the server via a crafted request that manipulates triggers.

Frequently asked questions

What is CVE-2021-42093?: An issue was discovered in Zammad before 4.1.1. An admin can execute code on the server via a crafted request that manipulates triggers.
How severe is CVE-2021-42093?: CVE-2021-42093 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-42093 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42093?: CVE-2021-42093 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42093?: 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-2021-42093 published?: CVE-2021-42093 was published on 2021-10-07 and last updated on 2026-06-17.

References

https://zammad.com/en/advisories/zaa-2021-10

Affected products (1)

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

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