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[NEW] [medium] Zammad: Multiple Vulnerabilities

medium
An attacker can exploit multiple vulnerabilities in Zammad to bypass security measures, disclose sensitive information or credentials, manipulate data, or perform cross-site scripting attacks.

CSIRTS triage

vendor: Zammadproduct: ZammadAuthentication bypassInformation disclosureCross-site scripting
What
Multiple vulnerabilities enable security bypass, information disclosure, credential exposure, data manipulation, and cross-site scripting.
Who is affected
Users of Zammad instances with remote or local access depending on vulnerability vector.
Urgency
Medium severity; not currently exploited but multiple attack vectors warrant prompt remediation.
Action
Update Zammad to the latest version containing security fixes for all identified vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-08-25
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2996

Recent advisories for Zammad

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories