What’s Vulnerable › Vulnerabilities

CVE-2021-35303

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-28 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross Site Scripting (XSS) in Zammad 1.0.x up to 4.0.0 allows remote attackers to execute arbitrary web script or HTML via the User Avatar attribute.

Affected products

• zammad: from 1.0.0 through 4.0.0

References

• https://zammad.com/en/advisories/zaa-2021-06
• https://zammad.com/en/advisories/zaa-2021-06

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