PatchTheCVECVE-2018-20370: SZ NetChat before 7.9 has XSS in the MyName input field of the Options module
CVE-2018-20370 is a medium-severity flaw (CVSS 5.4) affecting netchat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
SZ NetChat before 7.9 has XSS in the MyName input field of the Options module. Attackers are able to inject commands to compromise the enabled HTTP server web frontend.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.5% (top 56%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2018-12-23 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-20370?
netchat: upgrade to 7.9. Exact commands for each OS are on this page.
Is CVE-2018-20370 being exploited?
CVE-2018-20370 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-20370 affect?
CVE-2018-20370 affects netchat. Severity is medium (CVSS 5.4). SZ NetChat before 7.9 has XSS in the MyName input field of the Options module. Attackers are able to inject commands to compromise the enabled HTTP server web frontend.
How urgent is CVE-2018-20370?
Priority 30/100. No elevated risk signals yet.