mbCONNECT24: Direct Request
CVE-2026-10521 is a high-severity direct request vulnerability in mbCONNECT24 from MB connect line, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 2.20.2 as the first without the flaw, so updating mbCONNECT24 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.55% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update mbCONNECT24 to 2.20.2 or a later version.
- Update mymbCONNECT24 to 2.20.2 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| MB connect line | mbCONNECT24 | before 2.20.2; 2.20.1 | 2.20.2 |
| MB connect line | mymbCONNECT24 | before 2.20.2; 2.20.1 | 2.20.2 |
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
- HighAdministrator-level access is required first.
- 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:H/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (cert.vde.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.6 | High | CNA (cert.vde.com) |
| CVSS 3.1 | 7.2 | High | CNA (cert.vde.com) |
Official description
An high privileged remote attacker can access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Direct Request
The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files.
How developers prevent this class of flaw
- Apply appropriate access control authorizations for each access to all restricted URLs, scripts or files.
- Consider using MVC based frameworks such as Struts.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
References
Other references
Other vulnerabilities in mbCONNECT24
- 7.5 High severity
- 7.5 High severity
- 9.3 Critical severity
- 8.1 High severity
- 7.2 High severity
- 7.2 High severity
Recent Direct Request vulnerabilities
- 7.5 High severity
- 9.1 Critical severity
- 9.8 Critical severity
- 8.6 High severity
- 7.5 High severity
- 7.5 High severity
Spotted an error? Tell us.