CVE-2026-56731— Zammad: Cross-Site Scripting in Ticket Notifications
Quick assessment
Affected
zammad zammad
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zammad 是一款基于 Web 的开源客服/客户支持系统。在 7.0.1 版本之前，低权限的已认证用户可通过标准的工单创建流程，将任意 HTML 标记（包括 JavaScript 事件处理器）注入到工单标题中。该标题在未进行任何内容清洗的情况下被持久化存储。此问题已在 7.0.1 版本中修复。
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I. Basic Information for CVE-2026-56731
Vulnerability Information
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Vulnerability Title
Zammad: Cross-Site Scripting in Ticket Notifications
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-56731
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-56731 (2)
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https://github.com/zammad/zammad/security/advisories/GHSA-p9xp-gx8r-4397 x_refsource_CONFIRM
Same Patch Batch · zammad · 2026-09-25 · 30 CVEs total
| CVE-2026-84458 | 9.1 CRITICAL | Zammad: Account takeover via unverified email matching during SSO auto-link |
| CVE-2026-61525 | 8.8 HIGH | Zammad: Arbitrary File Deletion via Unvalidated Session Identifier in Long Polling Control |
| CVE-2026-56733 | 8.7 HIGH | Zammad: Incorrect Authorization and Improper Privilege Management |
| CVE-2026-56725 | 8.7 HIGH | Zammad: Denial of Service via OTRS Import Controller |
| CVE-2026-84462 | 8.6 HIGH | Zammad: AI Agent template sanitizer bypass leads to remote code execution |
| CVE-2026-56724 | 7.1 HIGH | Zammad: Incorrect implementation of permission checks in the knowledge base module |
| CVE-2026-84465 | 7.1 HIGH | Zammad: S/MIME signature verification allows forged sender impersonation |
| CVE-2026-84464 | 7.1 HIGH | Zammad: IDOR in External Data Source rendering exposes ticket, user, group, and organizati |
| CVE-2026-56727 | 7.1 HIGH | Zammad: PGP signature spoofing via unvalidated verification return |
| CVE-2026-56723 | 7.1 HIGH | Zammad: Missing authorization on ticket attachment download |
| CVE-2026-63207 | 6.9 MEDIUM | Zammad: Sensitive Information Exposure in Integration Administration API |
| CVE-2026-84461 | 6.9 MEDIUM | Zammad: Missing rate limiting allows password brute-forcing during two-factor login |
| CVE-2026-84463 | 6.3 MEDIUM | Zammad: Stored HTML injection in Knowledge Base video widget enables forced session switch |
| CVE-2026-56728 | 5.3 MEDIUM | Zammad: Cross-User Taskbar Item Access Control Vulnerability |
| CVE-2026-56735 | 5.3 MEDIUM | Zammad: Improper neutralization of `srcset` attribute in IMG tags in Zammad |
| CVE-2026-63206 | 5.3 MEDIUM | Zammad: Remote image tracking bypass via shortened URL scheme |
| CVE-2026-56734 | 5.3 MEDIUM | Zammad: Avatar Image URL Server-Side Request Forwarding |
| CVE-2026-56732 | 5.3 MEDIUM | Zammad: Malicious input in Ticket Body Enables Session Termination |
| CVE-2026-84460 | 5.3 MEDIUM | Zammad: Missing Authorization in TagsController#list Allows Cross-Object Tag Enumeration |
| CVE-2026-61855 | 5.3 MEDIUM | Zammad: Invalid PGP Detached Signatures Reported as Good Signature on Inbound Mail |
Showing top 20 of 30 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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CVE-2026-61855
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Same vendor: zammad
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CVE-2026-63208
Zammad: Microsoft Graph error logs expose partially masked O -
CVE-2026-63006
Zammad: HTML sanitizer API path allowlist bypass via interio -
CVE-2026-63204
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CVE-2026-61855
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CVE-2026-84461
Zammad: Missing rate limiting allows password brute-forcing
Same weakness: CWE-79
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V. Comments for CVE-2026-56731
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