CVE-2026-125804 in AI Engine Plugin
Summary
by MITRE • 11/15/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Meow Apps AI Engine ai-engine allows Stored XSS.This issue affects AI Engine: from n/a through 3.9.3.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/15/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests as a Stored XSS within the Meow Apps AI Engine, affecting versions ranging from n/a through 3.9.3. Unlike reflected XSS attacks where malicious scripts are executed immediately via a crafted link, stored vulnerabilities persist on the target server. In this context, an attacker can inject malicious client-side script into the application's database or storage mechanism. When other users subsequently access the affected pages of the AI Engine, their browsers retrieve and execute the injected code without any additional interaction from the victim beyond viewing the compromised content. This persistence makes stored XSS particularly dangerous as it impacts every user who views the infected page, potentially leading to widespread compromise within an organization using this software.
From a technical perspective, the root cause lies in the application's failure to properly sanitize or encode user-supplied input before rendering it in HTML responses. The AI Engine likely accepts data inputs that are intended for legitimate purposes but fails to distinguish between executable script content and safe text data. When these unsanitized inputs are processed and displayed back to users, the browser interprets them as active code rather than static text. This allows an attacker to execute arbitrary JavaScript in the context of the victim's session with the Meow Apps AI Engine. The impact is severe because it grants the attacker the ability to hijack user sessions by stealing cookies or authentication tokens, deface web pages, redirect users to malicious sites, or perform actions on behalf of the victim if they have administrative privileges within the application.
This vulnerability aligns directly with CWE-79, which defines Improper Neutralization of Input During Web Page Generation as a category where software does not neutralize special elements that could be interpreted as commands by a web browser. Furthermore, in terms of tactical mapping to the MITRE ATT&CK framework, this flaw facilitates several techniques including Credential Access via Browser Session Hijacking (T1539) and Collection via Screen Capture or Keylogging if the injected script is sophisticated enough to capture keystrokes or screen contents. The persistence of the payload means that a single successful injection can lead to multiple instances of exploitation across different users, amplifying the blast radius significantly compared to one-off attacks.
Mitigation strategies must focus on rigorous input validation and output encoding. Developers should implement strict allow-listing for all user inputs, ensuring that only expected characters are accepted. More critically, when rendering data in HTML contexts, developers must apply context-sensitive output encoding such as HTML entity encoding to prevent the browser from interpreting special characters like angle brackets or quotes as code delimiters. Utilizing modern web frameworks that automatically escape outputs by default can also reduce this risk significantly. For organizations currently running versions of Meow Apps AI Engine up to 3.9.3, immediate patching to a version where this issue is resolved is the most effective remediation step. In cases where upgrading is not immediately feasible, implementing Web Application Firewall rules that detect and block common XSS payloads in HTTP requests can provide an additional layer of defense against exploitation attempts until a permanent fix is deployed.