Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The bug is also present in version 7.0.0 to version 7.1.2, but not exploitable due to changes in the underlying framework.
Evidence confidence: Exploitation recorded
● Hype ● Reality
Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.
━ Hype Score (Perceived) ━ Reality threat priority. Definition changes are not new attacks.
Public exploit entries / repo candidates
Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.
Score evaluated: 2026-11-05 13:59:49.837387+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z