Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAttacker authenticates with low-privilege RT account
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DeliveryInjects JavaScript payload into unescaped data field
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ExploitPayload persisted to RT database
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ExecutionVictim user opens affected ticket or page
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PersistMalicious script executes in victim browser session
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ImpactSession credentials or sensitive data exfiltrated to attacker
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires three concurrent conditions: (1) the attacker holds a valid, authenticated RT account (PR:L per CVSS - unauthenticated access is not sufficient); (2) that account has permission to set the specific data field(s) affected by the missing HTML escaping; and (3) a separate victim user must actively navigate to and view the page where the injected payload is rendered (UI:R per CVSS - passive exploitation without victim interaction is not possible). The vulnerability is scoped to RT versions 6.0.0-6.0.2 only; earlier branches are not implicated by available data. There is no indication the vulnerability is exploitable without a pre-existing RT account, nor that it affects default read-only roles. The primary limiting factor is the authenticated, permissioned write access requirement. |
| Impact | The CVSS 5.4 Medium score is well-calibrated for this vulnerability. The network-accessible vector (AV:N/AC:L) reflects that exploitation requires no special network position beyond reaching the RT web interface, but PR:L and UI:R meaningfully constrain real-world risk - an attacker must hold a valid RT account with write permissions to the relevant data field, and a separate victim must actively view the affected page. The scope change (S:C) prevents under-rating this as purely a self-XSS. No EPSS data was provided in the intelligence; KEV listing is absent, indicating no confirmed active exploitation at time of analysis, and no POC is referenced. In practice, the primary concern is insider threat or compromised low-privilege RT accounts being leveraged to escalate impact by targeting administrators who review ticket data. The risk is real but bounded by the authentication prerequisite. |
| Exploit ScenarioDerived | An authenticated RT user - such as a help-desk agent with ticket-creation rights - crafts a ticket or data entry containing an embedded JavaScript payload in a field that lacks HTML escaping (e.g., a subject, custom field, or comment). The payload is stored in the RT database. When an RT administrator or senior user opens the affected ticket to review or resolve it, the script silently executes in their browser, potentially exfiltrating their session token to an attacker-controlled endpoint or performing privileged RT actions on their behalf. No POC is referenced in the available intelligence. |
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Alert meAnalysisAIv1 – Jul 20, 2026
Stored Cross-Site Scripting in Best Practical RT versions 6.0.0 through 6.0.2 allows an authenticated attacker with write access to inject persistent JavaScript payloads into ticket or configuration data, which then executes in the browsers of other RT users who view the affected pages. The CVSS scope change (S:C) reflects cross-user browser context impact - injected scripts operate in the victim's session, enabling session hijacking or unauthorized actions. No public exploit is identified at time of analysis; vendor-released patch is confirmed in RT 6.0.3, published 2026-05-20.
RemediationAI
Upgrade to RT 6.0.3, released 2026-05-20, which is confirmed by the vendor to address this stored XSS vulnerability. The release tarball is available at https://download.bestpractical.com/pub/rt/release/rt-6.0.3.tar.gz (SHA-256: 117b53e7a46e82ade662050d98920f1255865ca873d6bec80036085b17dd3dc6). Note that RT 6.0.3 itself contains a missed fix for a separate spreadsheet injection issue (CVE-2026-41073); organizations should also apply the patch at https://github.com/bestpractical/rt/commit/525547751b76cc422015960bae3056f4e8d4351f.patch until RT 6.0.4 is released. If immediate upgrade is not feasible, restrict write permissions on affected data fields to the minimum required set of trusted users, thereby reducing the population of accounts capable of injecting payloads. Content Security Policy (CSP) headers can reduce XSS exploitability as a defense-in-depth measure, though they do not eliminate the underlying vulnerability.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
RT (Request Tracker) is an open-source, enterprise-grade issue and ticket tracking system developed by Best Practical Solutions, identified by CPE cpe:2.3:a:bestpractical:rt:*:*:*:*:*:*:*:*. The root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation), specifically a stored XSS variant: user-supplied data is persisted in the RT database and later re-rendered in HTML responses without adequate output encoding or HTML escaping. This is a classic server-side template rendering failure where untrusted input is reflected into page output without sanitization. The CVSS S:C (scope change) metric confirms the injected script crosses the security boundary from the attacker's write context into the victim's browser execution context, a defining characteristic of stored XSS in multi-user web applications.
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Stored XSS requires authenticated write access (PR:L) and victim page view (UI:R); scope change reflects cross-user browser execution; no availability impact applies.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
1DescriptionCVE.org
RT is an open source, enterprise-grade issue and ticket tracking system. Versions 6.0.0 and above, prior to 6.0.3, contain a stored Cross-Site Scripting (XSS) vulnerability, where user-controlled data is rendered without proper HTML escaping. An authenticated user with permission to set the relevant data can inject JavaScript that executes when another RT user views the affected page. This issue has been fixed in version 6.0.3.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Privilege escalation and information disclosure in Best Practical's Request Tracker (RT) 6.0.0-6.0.2 and versions before
Authenticated SQL injection in Best Practical's Request Tracker (RT) ticketing system affects versions 5.0.0-5.0.9 and 6
Authentication bypass in Best Practical's Request Tracker (RT) versions 5.0.9 and prior, and 6.0.0 through 6.0.2, allows
Cross-site request forgery in Best Practical Request Tracker (RT) versions 6.0.0 through 6.0.2 allows remote attackers t
Request Tracker (RT) 3.8.x before 3.8.17 and 4.0.x before 4.0.13 does not properly restrict access to private callback c
Cross-site request forgery (CSRF) vulnerability in Request Tracker (RT) 3.8.12 and other versions before 3.8.15, and 4.0
Reflected Cross-Site Scripting in Best Practical RT versions 5.0.4-5.0.9 and 6.0.0-6.0.2 allows an unauthenticated attac
Reflected Cross-Site Scripting in RT (Request Tracker) 6.0.0 through 6.0.2 allows an unauthenticated network attacker to
Request Tracker (RT) 3.8.x before 3.8.17 and 4.0.x before 4.0.13 allows remote authenticated users with the permissions
Request Tracker (RT) 4.x before 4.0.13 does not properly enforce the DeleteTicket and "custom lifecycle transition" perm
Stored XSS in Best Practical RT (versions 5.0.0-5.0.9 and 6.0.0-6.0.2) allows any authenticated user with file upload pe
Algorithmic complexity vulnerability in Email::Address::List before 0.02, as used in RT 4.2.0 through 4.2.2, allows remo
EUVD-2026-46049
NVD
CVE.org
EPSS
Vulnrichment
GitHub
VulDB
Exploit-DB