CVE-2018-12550 affects Eclipse Mosquitto versions 1.0 through 1.5.5. The vulnerability arises when Mosquitto is configured with an empty Access Control List (ACL) file, or one containing only comments or blank lines, causing it to default to an "allow all" policy instead of denying all access as expected. This is a high-severity vulnerability (CVSS 8.1) with a network attack vector and high impact on confidentiality, integrity, and availability, as it can lead to unauthorized access to the MQTT broker. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion regarding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.0, <= 1.5.5CPE matchmatch criteria | cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:* | ||
<= 1.5.5CPE match | cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.