CVE-2026-33616 MB connect line mbCONNECT24 vulnerable to an unauthenticated SQL injection in the mb24api Endpoint
Unauthenticated attackers can exploit blind SQL injection in the mb24api endpoint to read sensitive data from the database.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33616?
CVE-2026-33616 is a high-severity SQL injection vulnerability in mbCONNECT24, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An unauthenticated remote attacker can exploit an unauthenticated blind SQL Injection vulnerability in the mb24api endpoint due to improper neutralization of special elements in a SQL SELECT command. This can result in a total loss of confidentiality.
Weakness: CWE-89
Which versions are affected by CVE-2026-33616?
It affects 2 products.
Products include Mbconnectline Mbconnect24, Mbconnectline Mymbconnect24.
How do I fix CVE-2026-33616?
No fix has been published for CVE-2026-33616 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-33616 being exploited?
There is no known exploitation of CVE-2026-33616 in the wild and no public exploit code.
Other vulnerabilities in mbCONNECT24
- CVE-2020-35565 Security feature bypass in n/a
- CVE-2020-10383 Code injection in n/a
- CVE-2026-33615 MB connect line mbCONNECT24 vulnerable to an unauthenticated SQL injection in the setinfo Endpoint
- CVE-2023-0985 Helmholz and MB Connect Line: Account takeover via password reset in multiple products
- CVE-2020-10382 Code injection in n/a
Sources
Also known as GHSA-4cxq-66m5-gvgm.