CVE-2025-51858: Self-XSS Vulnerability in ChatPlayground.ai Puts User Data at Risk
A self Cross-Site Scripting (XSS) vulnerability has been discovered in ChatPlayground.ai. By convincing a user to upload a specially crafted SVG file through the chat component, an attacker could potentially execute arbitrary code in the user's browser and gain access to sensitive information. While requiring user interaction limits the scope, the potential impact on user accounts necessitates immediate attention.
Vulnerability Details
- CVE ID: CVE-2025-51858
- Description: A self Cross-Site Scripting (XSS) vulnerability in ChatPlayground.ai through 2025-05-24, allows attackers to execute arbitrary code and gain sensitive information via a crafted SVG file contents sent through the chat component.
- CVSS Score: 6.1 MEDIUM
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS Explanation: This score indicates a medium severity vulnerability. It is network-based (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), and user interaction (UI:R). The scope is changed (S:C), with low impact on confidentiality (C:L) and integrity (I:L), and no impact on availability (A:N). An attacker needs to trick a user into performing an action.
- Exploit Requirements: An attacker needs to craft a malicious SVG file and convince a ChatPlayground.ai user to upload and view it through the chat interface. This usually involves social engineering.
- Affected Vendor: ChatPlayground.ai
- Affected Product: ChatPlayground.ai
- Affected Version: Up to 2025-05-24
- CWE: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') - This means the application doesn't properly sanitize user-provided input before displaying it in a web page, allowing malicious scripts to be injected.
Timeline of Events
- 2025-05-24: Vulnerability Existed Up To.
- 2025-07-22: CVE ID Requested and Received.
Exploitability & Real-World Risk
While this is a self-XSS vulnerability, it doesn't mean it's harmless. Attackers could use social engineering to trick users into uploading a malicious SVG file. If successful, the attacker could potentially steal cookies, redirect the user to a malicious website, or deface the ChatPlayground.ai page within the user's session. Even though it requires user interaction, the widespread use of ChatPlayground.ai makes it a target worth considering.
Recommendations
- Do not upload files from untrusted sources: Only upload SVG files from sources you absolutely trust.
- Update ChatPlayground.ai: If updates are available, apply them immediately to patch the vulnerability.
- Report Suspicious Activity: If you suspect you have been targeted, report it to ChatPlayground.ai support.
Technical Insight
The vulnerability likely stems from the way ChatPlayground.ai handles SVG files uploaded through the chat interface. If the application doesn't properly sanitize the SVG content, malicious JavaScript code embedded within the file can be executed when the user views the image. Browsers often execute JavaScript within SVG files, which can be exploited if the application allows unsanitized SVG content to be rendered.
Credit to Researcher(s)
This vulnerability was reported by Secsys-FDU.
References
Tags
#XSS #CVE-2025-51858 #ChatPlayground.ai #SVG #Self-XSS #WebSecurity #Vulnerability
Summary: A self Cross-Site Scripting (XSS) vulnerability has been identified in ChatPlayground.ai, allowing attackers to potentially execute arbitrary code and steal sensitive information by tricking users into uploading malicious SVG files through the chat component. Users are advised to exercise caution when uploading files and ensure their ChatPlayground.ai installation is up to date.
CVE ID: CVE-2025-51858
Risk Analysis: Successful exploitation could allow an attacker to execute arbitrary code in the victim's browser, potentially stealing cookies, redirecting to malicious sites, or performing actions on behalf of the user within the ChatPlayground.ai application.
Recommendation: Users should exercise caution when uploading files, only uploading files from trusted sources. ChatPlayground.ai should implement proper input sanitization to prevent the execution of malicious scripts within SVG files.
Timeline
- 2025-05-24: Vulnerability existed up to this date.
- 2025-07-22: CVE ID assigned.