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CVE-2026-105455— Stored XSS via related ticket subject on RTIR Split and Create Incident forms

Quick assessment

Affected
Best Practical Solutions RT for Incident Response
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.

RTIR 在拆分工单或从报告创建事件时，其工单创建表单会显示相关工单的主题，且在渲染该主题时未进行 HTML 转义。若工单主题中包含脚本，当用户打开上述任一表单时，该脚本将被执行。由于 RTIR 默认允许所有用户创建事件报告，因此未认证的邮件报告发送者即可设置该主题。随后，该脚本将在负责处理事件的工单处理人员（即从报告创建事件或拆分事件的用户）的会话中运行，并能够以该用户的权限在 RT 系统中执行操作。 该问题已在版本 6.0.4 中修复。RTIR 5.0 不受此问题影响。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-105455

Vulnerability Information
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Vulnerability Title
Stored XSS via related ticket subject on RTIR Split and Create Incident forms
Source: CVE Program / CVE List V5
Vulnerability Description
RTIR's ticket creation forms show the subject of the related ticket when splitting a ticket or creating an incident from a report, and they render that subject without HTML escaping. A ticket subject containing script runs it when a user opens either form. RTIR grants everyone the right to create Incident Reports by default, so an unauthenticated sender of an emailed report can set that subject. The script then runs in the session of the incident handler who creates an incident from the report or splits it, and can act in RT with that user's authority.  The issue was fixed in version 6.0.4. RTIR 5.0 is not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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

Vendor Product Affected Versions CPE Subscribe
Best Practical Solutions RT for Incident Response 6.0.0 ~ 6.0.4 -

II. Public POCs for CVE-2026-105455

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III. Intelligence Information for CVE-2026-105455

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Other References for CVE-2026-105455 (2)

Same Patch Batch · Best Practical Solutions · 2026-10-30 · 3 CVEs total

CVE-2026-105454 5.3 MEDIUM Stored XSS via crafted URLs in HTML ticket content in Request Tracker
CVE-2026-105456 5.3 MEDIUM Stored XSS via HTML scrubber rule in RTIR

IV. Related Vulnerabilities

Same product: RT for Incident Response
Same vendor: Best Practical Solutions
Same weakness: CWE-79