How severe is CVE-2020-29160?

CVE-2020-29160 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-29160 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29160?

CVE-2020-29160 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29160?

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-2020-29160 published?

CVE-2020-29160 was published on 2020-12-28 and last updated on 2026-06-17.

CVE-2020-29160

CVE-2020-29160 is a high-severity vulnerability in Zammad with a CVSS 3.x base score of 7.5. 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-862.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Zammad
Published: 2020-12-28
Last modified: 2026-06-17

Description

An issue was discovered in Zammad before 3.5.1. A REST API call allows an attacker to change Ticket Article data in a way that defeats auditing.

Frequently asked questions

What is CVE-2020-29160?: An issue was discovered in Zammad before 3.5.1. A REST API call allows an attacker to change Ticket Article data in a way that defeats auditing.
How severe is CVE-2020-29160?: CVE-2020-29160 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-29160 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29160?: CVE-2020-29160 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29160?: 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-2020-29160 published?: CVE-2020-29160 was published on 2020-12-28 and last updated on 2026-06-17.

References

Affected products (1)

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

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