How severe is CVE-2023-31597?

CVE-2023-31597 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-31597 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31597?

CVE-2023-31597 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31597?

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

When was CVE-2023-31597 published?

CVE-2023-31597 was published on 2023-05-18 and last updated on 2026-06-17.

CVE-2023-31597

CVE-2023-31597 is a medium-severity vulnerability in Zammad 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Zammad
Published: 2023-05-18
Last modified: 2026-06-17

Description

An issue in Zammad v5.4.0 allows attackers to bypass e-mail verification using an arbitrary address and manipulate the data of the generated user. Attackers are also able to gain unauthorized access to existing tickets.

Frequently asked questions

What is CVE-2023-31597?: An issue in Zammad v5.4.0 allows attackers to bypass e-mail verification using an arbitrary address and manipulate the data of the generated user. Attackers are also able to gain unauthorized access to existing tickets.
How severe is CVE-2023-31597?: CVE-2023-31597 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-31597 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31597?: CVE-2023-31597 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31597?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-31597 published?: CVE-2023-31597 was published on 2023-05-18 and last updated on 2026-06-17.

References

https://zammad.com/de/advisories/zaa-2023-03

Affected products (1)

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

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