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CVE-2026-56731

Zammad: Cross-Site Scripting in Ticket Notifications

HIGH

8.4

CVSS Score

Published: September 25, 2026 at 05:04 PM UTC

Updated: September 28, 2026 at 02:45 PM UTC

1 product affected across 1 vendorZammad

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Severity

HIGH8.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a low-privilege authenticated user may inject arbitrary HTML markup, including JavaScript event handlers, into a ticket title via the standard ticket creation workflow. The title is persisted without sanitization. This issue is fixed in version 7.0.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zammad · Zammad

60%

v < 7.0.1

Affected range stops below 7.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRM

Source: cverecord

https://github.com/zammad/zammad/security/advisories/GHSA-p9xp-gx8r-4397

x_refsource_MISC

Source: cverecord

https://github.com/zammad/zammad/commit/16a4a2e1be6642ec0c3ba3a76e358ad065f48f78

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-79

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