CVE-2021-35300
CVE-2021-35300 is a medium-severity vulnerability in Zammad with a CVSS 3.x base score of 4.3. 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-1021.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1021
- Affected product: Zammad
- Published:
- Last modified:
Description
Text injection/Content Spoofing in 404 page in Zammad 1.0.x up to 4.0.0 could allow remote attackers to manipulate users into visiting the attackers' page.
Frequently asked questions
- What is CVE-2021-35300?
- Text injection/Content Spoofing in 404 page in Zammad 1.0.x up to 4.0.0 could allow remote attackers to manipulate users into visiting the attackers' page.
- How severe is CVE-2021-35300?
- CVE-2021-35300 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2021-35300 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-2021-35300?
- CVE-2021-35300 affects Zammad. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-35300?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-35300 published?
- CVE-2021-35300 was published on 2021-06-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*
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