How severe is CVE-2022-40816?

CVE-2022-40816 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-2022-40816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40816?

CVE-2022-40816 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-40816?

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

When was CVE-2022-40816 published?

CVE-2022-40816 was published on 2022-09-27 and last updated on 2026-06-17.

CVE-2022-40816

CVE-2022-40816 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: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Zammad
Published: 2022-09-27
Last modified: 2026-06-17

Description

Zammad 5.2.1 is vulnerable to Incorrect Access Control. Zammad's asset handling mechanism has logic to ensure that customer users are not able to see personal information of other users. This logic was not effective when used through a web socket connection, so that a logged-in attacker would be able to fetch personal data of other users by querying the Zammad API. This issue is fixed in , 5.2.2.

Frequently asked questions

What is CVE-2022-40816?: Zammad 5.2.1 is vulnerable to Incorrect Access Control. Zammad's asset handling mechanism has logic to ensure that customer users are not able to see personal information of other users. This logic was not effective when used through a web socket connection, so that a logged-in attacker would be able to fetch personal data of other users by querying the Zammad API. This issue is fixed in , 5.2.2.
How severe is CVE-2022-40816?: CVE-2022-40816 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-2022-40816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40816?: CVE-2022-40816 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-40816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-40816 published?: CVE-2022-40816 was published on 2022-09-27 and last updated on 2026-06-17.

References

https://zammad.com/de/advisories/zaa-2022-09

Affected products (1)

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

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