CVE-2024-42655 Missing authorization in n/a
Attackers can bypass access controls to read sensitive system topic messages in NanoMQ by exploiting MQTT wildcard characters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-42655?
CVE-2024-42655 is a high-severity missing authorization vulnerability in n/a, published on 29 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An access control issue in NanoMQ v0.21.10 allows attackers to bypass security restrictions and access sensitive system topic messages using MQTT wildcard characters.
Weakness: CWE-284
Which versions are affected by CVE-2024-42655?
It affects 1 product.
Products include Emqx Nanomq.
How do I fix CVE-2024-42655?
No fix has been published for CVE-2024-42655 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-42655 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-42655 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-w7fr-grpr-9jg5.