Description
A flaw was found in Rubygem MQTT. By default, the package used to not have hostname validation, resulting in possible Man-in-the-Middle (MITM) attack.
Basic information
- Type
- reviewed
- Severity
- high
- Advisory on GitHub
- Open advisory ↗
- Repository advisory
- —
- Source code
- Browse source ↗
- Published (advisory)
- 2025-11-06 21:31:31 UTC
- Updated
- 2025-11-06 23:50:27 UTC
- GitHub reviewed
- 2025-11-06 23:50:27 UTC
- NVD published
- 2025-11-06
EPSS Score
| Score |
Percentile |
|
0.04%
|
12.83% |
CVSS Scores
| Base score |
Version |
Severity |
Vector |
|
7.4
|
3.1 |
—
|
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
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- Attack vector (AV:N)
- Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
- Attack complexity (AC:H)
- Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
- Privileges required (PR:N)
- No account or special rights needed—anonymous or random user is enough.
- User interaction (UI:N)
- Nobody has to click “OK” or open a trap file; it can work without a victim helping.
- Scope (S:U)
- Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
- Confidentiality (C:H)
- Serious risk that confidential data gets exposed in a big way.
- Integrity (I:H)
- They could widely tamper with or forge data—trust in the data is badly hurt.
- Availability (A:N)
- Service keeps running; no real outage angle.
|
CWEs
| CWE id |
Name |
|
CWE-29
|
Path Traversal: '..filename' |
Affected packages (1)
Vulnerable version ranges and first patched releases as published by GitHub.
| Ecosystem |
Package |
Vulnerable range |
First patched |
Vulnerable functions |
| rubygems |
mqtt |
< 0.7.0 |
0.7.0 |
—
|
cvelogic
Threat Intelligence