CVE-2023-49785Public exploitNetwork attack vector

Internal resource access and XSS via open proxy

Published Mar 11, 2024 · Updated Aug 19, 2024

Server-side request forgery and reflected XSS in NextChat 2.11.2 and earlier allow remote attackers to access internal HTTP resources. The /api/cors route accepts an attacker-selected destination and method, forwards the request without authentication or destination restrictions, and returns the response; it also fetches data URLs and reflects their decoded HTML. Any network client that can reach a server deployment can read or modify reachable internal services, proxy Internet traffic, or execute reflected script in a browser.

CVSS severity9.3
Critical
EPSS probability83.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery and reflected XSS in NextChat 2.11.2 and earlier allow remote attackers to access internal HTTP resources. The /api/cors route accepts an attacker-selected destination and method, forwards the request without authentication or destination restrictions, and returns the response; it also fetches data URLs and reflects their decoded HTML. Any network client that can reach a server deployment can read or modify reachable internal services, proxy Internet traffic, or execute reflected script in a browser.

The record

CVE
CVE-2023-49785
Published
Mar 11, 2024
Updated
Aug 19, 2024
Vendor
ChatGPTNextWeb
Product
NextChat
Classifications
CWE-79, CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ChatGPTNextWeb · NextChatversion=0 <=2.11.2

Published CVSS scores

9.1GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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