NextChat vulnerable to Server-Side Request Forgery and Cross-site Scripting
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
NextChat, also known as ChatGPT-Next-Web, is a cross-platform chat user interface for use with ChatGPT. Versions 2.11.2 and prior are vulnerable to server-side request forgery and cross-site scripting. This vulnerability enables read access to internal HTTP endpoints but also write access using HTTP POST, PUT, and other methods. Attackers can also use this vulnerability to mask their source IP by forwarding malicious traffic intended for other Internet targets through these open proxies. As of time of publication, no patch is available, but other mitigation strategies are available. Users may avoid exposing the application to the public internet or, if exposing the application to the internet, ensure it is an isolated network with no access to any other internal resources.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ChatGPTNextWeb | NextChat | up to 2.11.2 | — | No fix listed | CNA |
| — | nextchat (npm) | up to 2.11.2 | — | No fix listed | GHSA-qf3q-9f3h-cjp9 |
- NextChat VendorChatGPTNextWeb Affected up to 2.11.2 Fixed in — No fix listed CNA
- nextchat (npm) Vendor— Affected up to 2.11.2 Fixed in — No fix listed GHSA-qf3q-9f3h-cjp9
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nextchat:nextchat:*:*:*:*:*:*:*:* | up to 2.11.2 | Vulnerable | ChatGPTNextWeb |
- cpe:2.3:a:nextchat:nextchat:*:*:*:*:*:*:*:* Versions up to 2.11.2 Vulnerable ·ChatGPTNextWeb
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-49785
- 2026-10-03 Alias added: GHSA-qf3q-9f3h-cjp9
References
Exploit 4
- https://www.horizon3.ai/attack-research/attack-blogs/nextchat-an-ai-chatbot-that-lets-you-talk-to-anyone-you-want-to/
- https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web/issues/4283
- https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web/pull/4285
- https://www.vicarius.io/vsociety/posts/hacking-ai-chatbots-for-fun-and-learning-analyzing-an-unauthenticated-ssrf-and-reflected-xss-in-chatgpt-next-web-cve-2023-49785
More ChatGPTNextWeb Nextchat vulnerabilities
- TI-2025-32232 Directory traversal vulnerability in NextChat thru 2.16.0 due to the WebDAV proxy failing… CVSS 3.1HIGH 7.5
- TI-2026-06301 ChatGPTNextWeb NextChat Artifacts Endpoint route.ts storeUrl server-side request forgery CVSS 4.0MEDIUM 6.9
- TI-2026-06300 ChatGPTNextWeb NextChat route.ts proxyHandler server-side request forgery CVSS 4.0MEDIUM 6.9
Sources
- CVE-2023-49785 · CVE Program
- CVE-2023-49785 · NVD
- FIRST EPSS
- GHSA-qf3q-9f3h-cjp9 · GitHub Advisory Database · CC BY 4.0
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