CVE-2017-7650
In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'.
Does this matter?
Lower severity and a low EPSS score (2.47%). Track it; it rarely justifies an emergency change on its own.
Description
In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.47% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- eclipse/mosquitto · debian/debian linux
- Source
- emo@eclipse.org
EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://mosquitto.org/2017/05/security-advisory-cve-2017-7650/Patch, Vendor Advisory
- http://www.debian.org/security/2017/dsa-3865Third Party Advisory
- http://www.securityfocus.com/bid/98741Third Party Advisory, VDB Entry
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=516765Exploit, Third Party Advisory
- http://mosquitto.org/2017/05/security-advisory-cve-2017-7650/Patch, Vendor Advisory
- http://www.debian.org/security/2017/dsa-3865Third Party Advisory
- http://www.securityfocus.com/bid/98741Third Party Advisory, VDB Entry
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=516765Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.