How severe is CVE-2021-35302?

CVE-2021-35302 has a CVSS 3.x base score of 5.3, 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 none, and availability none.

Is CVE-2021-35302 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35302?

CVE-2021-35302 affects Zammad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35302?

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

When was CVE-2021-35302 published?

CVE-2021-35302 was published on 2021-06-28 and last updated on 2026-06-17.

CVE-2021-35302

CVE-2021-35302 is a medium-severity vulnerability in Zammad with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zammad
Published: 2021-06-28
Last modified: 2026-06-17

Description

Incorrect Access Control for linked Tickets in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information.

Frequently asked questions

What is CVE-2021-35302?: Incorrect Access Control for linked Tickets in Zammad 1.0.x up to 4.0.0 allows remote attackers to obtain sensitive information.
How severe is CVE-2021-35302?: CVE-2021-35302 has a CVSS 3.x base score of 5.3, 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 none, and availability none.
Is CVE-2021-35302 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35302?: CVE-2021-35302 affects Zammad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35302?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35302 published?: CVE-2021-35302 was published on 2021-06-28 and last updated on 2026-06-17.

References

https://zammad.com/en/advisories/zaa-2021-04

Affected products (1)

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

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