Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-61525— Zammad: Arbitrary File Deletion via Unvalidated Session Identifier in Long Polling Controller

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。在版本 7.0.2 和 7.1.0 中，Zammad 对 WebSocket 和长轮询（long-polling）连接会话管理存在路径遍历漏洞。客户端提供的会话标识符在用于构造内部文件路径之前，未经过充分验证。当启用基于文件的会话存储时（默认配置），经过身份验证的攻击者可以通过操纵会话标识符，引用预期存储目录之外的位置，从而导致服务器上任意文件和目录被删除。该漏洞利用仅需一个低权限的已认证会话和一个精心构造的请求即可实现。配置为使用基于 Redis 的会话

CVSS 8.8 · High EPSS 0.36% · P27
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-61525

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Zammad: Arbitrary File Deletion via Unvalidated Session Identifier in Long Polling Controller
Source: CVE Program / CVE List V5
Vulnerability Description
Zammad is a web based open source helpdesk/customer support system. In 7.0.2 and 7.1.0, zammad's session management for websocket and long-polling connections is susceptible to a path traversal attack. Session identifiers supplied by the client are insufficiently validated before being used to construct internal file paths. When the file-based session store is active (the default configuration), an authenticated attacker can manipulate the session identifier to reference locations outside the intended storage directory, leading to the deletion of arbitrary files and directories on the server. Exploitation requires only a low-privilege authenticated session and a single crafted request. Instances configured to use the Redis-based session store are not affected. This issue is fixed in versions 7.0.3 and 7.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
zammad zammad = 7.0.2 -

II. Public POCs for CVE-2026-61525

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-61525

请登录查看更多情报信息。

Other References for CVE-2026-61525 (3)

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-2026-56733 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-2026-56731 8.4 HIGH Zammad: Cross-Site Scripting in Ticket Notifications
CVE-2026-56724 7.1 HIGH Zammad: Incorrect implementation of permission checks in the knowledge base module
CVE-2026-56723 7.1 HIGH Zammad: Missing authorization on ticket attachment download
CVE-2026-84465 7.1 HIGH Zammad: S/MIME signature verification allows forged sender impersonation
CVE-2026-56727 7.1 HIGH Zammad: PGP signature spoofing via unvalidated verification return
CVE-2026-84464 7.1 HIGH Zammad: IDOR in External Data Source rendering exposes ticket, user, group, and organizati
CVE-2026-84461 6.9 MEDIUM Zammad: Missing rate limiting allows password brute-forcing during two-factor login
CVE-2026-63207 6.9 MEDIUM Zammad: Sensitive Information Exposure in Integration Administration API
CVE-2026-84463 6.3 MEDIUM Zammad: Stored HTML injection in Knowledge Base video widget enables forced session switch
CVE-2026-84460 5.3 MEDIUM Zammad: Missing Authorization in TagsController#list Allows Cross-Object Tag Enumeration
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-2026-56734 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-2026-63206 5.3 MEDIUM Zammad: Remote image tracking bypass via shortened URL scheme
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

Same product: zammad
Same vendor: zammad
Same weakness: CWE-22

V. Comments for CVE-2026-61525

No comments yet

Leave a comment