CVE-2026-71447 in AIL Framework
Summary
by MITRE • 08/07/2026
AIL Project contains a stored cross-site scripting vulnerability in the translation controls displayed for chat messages and forum posts.
The affected templates inserted message and post identifiers directly into inline JavaScript onclick handlers:
onclick="translateMessageToPreferredLanguage('{{ message['id'] }}', '{{ mess_id_escape }}', this)"
and:
onclick="translatePostToPreferredLanguage('{{ post['id'] }}', '{{ post_id_escape }}', this)"
These values were HTML-template escaped but were not safely encoded for use as JavaScript string literals inside an HTML attribute. A specially crafted identifier containing quotation marks, escape characters, or other JavaScript syntax could therefore terminate the expected string argument and inject arbitrary JavaScript into the event handler.
Because the affected values are associated with indexed chat messages or forum posts, a malicious value may remain stored by AIL and be rendered whenever an analyst accesses the corresponding chat or forum explorer view.
Successful exploitation requires the victim to click the affected Translate to preferred language button. The injected code would then execute in the victim’s browser under the security origin of the AIL instance.
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a classic stored cross-site scripting flaw that exists within the AIL Project's translation functionality, specifically affecting chat messages and forum posts. The issue stems from improper input sanitization practices where message and post identifiers are directly embedded into JavaScript event handlers without adequate protection against code injection attacks. The affected templates demonstrate a dangerous pattern of template injection where user-controllable data flows into inline javascript attributes without proper contextual escaping for the javascript execution context.
The technical implementation flaw occurs at the template rendering level where HTML-template escaped values are insufficient to protect against javascript injection when these values appear within javascript string literals inside html attributes. This creates a context switching vulnerability where the same data must be properly escaped for multiple contexts - html attribute context and javascript string context. The specific attack vector involves crafting malicious identifiers containing quotation marks, backslashes, or other javascript syntax that can terminate the expected string literal and inject arbitrary javascript code into the onclick handler. This represents a CWE-79: Improper Neutralization of Input During Web Page Generation vulnerability where input validation and output encoding are insufficiently applied.
The operational impact of this vulnerability is significant as it allows attackers to persist malicious code within the AIL platform itself through the chat and forum systems. Since these identifiers are associated with indexed content, any malicious input remains stored in the system and executes whenever analysts access the corresponding views through the translation controls. This creates a persistent threat that can affect all users who interact with the vulnerable functionality, potentially leading to session hijacking, data exfiltration, or further privilege escalation attacks. The requirement for user interaction through clicking the translate button means this vulnerability follows the typical user-initiated XSS pattern that aligns with ATT&CK technique T1566.001: Phishing.
The attack scenario begins with an attacker creating a malicious chat message or forum post containing specially crafted identifiers designed to break out of the expected javascript string context. When analysts subsequently click the translate button, their browsers execute the injected javascript code within the security context of the AIL application. This creates a persistent threat that can be used to establish backdoors, steal session cookies, or manipulate user interface elements to perform further attacks against the platform or its users. The vulnerability's persistence through stored data makes it particularly dangerous as it can affect multiple users over time without requiring repeated exploitation attempts.
Mitigation strategies should focus on implementing proper context-appropriate escaping for all user-controllable data that flows into javascript contexts within html attributes. This includes utilizing javascript-specific encoding functions such as JSON.stringify or dedicated javascript escaping libraries before inserting values into onclick handlers. Additionally, the platform should implement strict input validation and sanitization for identifiers used in user-facing content to prevent malicious payloads from being stored. The solution aligns with security best practices outlined in OWASP Top 10 and should include automatic detection of such vulnerabilities through static code analysis tools that can identify template injection patterns and improper escaping scenarios. Regular security testing and code reviews focusing on cross-context data flow are essential to prevent similar issues in other components of the application.