MCPHub: Improper Authentication
CVE-2025-11287 is a critical-severity improper authentication vulnerability in MCPHub from Samanhappy, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected MCPHub versions: 0.9.0; 0.9.1; 0.9.2, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.56% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of MCPHub you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Samanhappy | MCPHub | 0.9.0; 0.9.1; 0.9.2; 0.9.3; 0.9.4; 0.9.5; 0.9.6; 0.9.7; and 3 more ranges | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.5 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.3 | High | CNA (vuldb.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 2.0 | 7.5 | High | CNA (vuldb.com) |
Official description
A vulnerability was identified in samanhappy MCPHub up to 0.9.10. This vulnerability affects the function handleSseConnectionfunction of the file src/services/sseService.ts. Such manipulation leads to improper authentication. The attack may be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.327045Third Party Advisory, VDB Entry
- vuldb.com/?submit.661170Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- github.com/August829/YU1/issues/8Exploit, Issue Tracking
Other references
- vuldb.com/?ctiid.327045Permissions Required, VDB Entry
Other vulnerabilities in MCPHub
- 7.7 High severity
- 7.6 High severity
- 9.9 Critical severity
- 7.1 High severity
- 8.1 High severity
- 7.1 High severity
Recent Improper Authentication vulnerabilities
- 9.8 Critical severity
Oracle E-Business Suite Unspecified Exploited
- 8.4 High severity
- 9.4 Critical severity
- 8.1 High severity
- 8.4 High severity
- 9.3 Critical severity
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