GHSA-qf3q-9f3h-cjp9 — nextchat
CRITICALGHSA-qf3q-9f3h-cjp9 is a critical-severity (CVSS 9.1) Cross-site Scripting (XSS) vulnerability in nextchat. EPSS puts its 30-day exploitation probability at 83.2% (100th percentile). No vendor fix is recorded yet; mitigation options are listed below.
NextChat has full-read SSRF and XSS vulnerability in /api/cors endpoint
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-qf3q-9f3h-cjp9.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-qf3q-9f3h-cjp9 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE sits: patch-first territory.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
nextchatReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | nextchat | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nextchat, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of nextchat has shipped for GHSA-qf3q-9f3h-cjp9 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-qf3q-9f3h-cjp9 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-qf3q-9f3h-cjp9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect GHSA-qf3q-9f3h-cjp9
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-qf3q-9f3h-cjp9 -u https://target- Template
- ChatGPT-Next-Web - SSRF/XSS
- Severity
- critical
- Impact
- Unauthenticated attackers can exploit SSRF vulnerabilities through the /api/cors endpoint to access internal network resources and inject malicious JavaScript for cross-site scripting attacks.
- Remediation
- Do not expose to the Internet
Template by ProjectDiscovery nuclei-templates (high), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-qf3q-9f3h-cjp9 in your dependencies?
O3 Security finds GHSA-qf3q-9f3h-cjp9 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.