PatchTheCVECVE-2022-39221: McWebserver mod runs a simple HTTP server alongside the Minecraft server in seperate threads
CVE-2022-39221 is a high-severity flaw (CVSS 7.5) affecting mcwebserver minecraft mod for fabric and quilt, mcwebserver minecraft mod for forge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
McWebserver mod runs a simple HTTP server alongside the Minecraft server in seperate threads. Path traversal in McWebserver Minecraft Mod for Fabric and Quilt up to and including 0.1.2.1 and McWebserver Minecraft Mod for Forge up to and including 0.1.1 allows all files, accessible by the program, to be read by anyone via HTTP request. Version 0.2.0 with patches are released to both platforms (Fabric and Quilt, Forge). As a workaround, the McWebse
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 36%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2022-09-21 |
| 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-2022-39221?
mcwebserver minecraft mod for fabric and quilt: upgrade to newer than 0.1.2.1; mcwebserver minecraft mod for forge: upgrade to newer than 0.1.1. Exact commands for each OS are on this page.
Is CVE-2022-39221 being exploited?
CVE-2022-39221 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-2022-39221 affect?
CVE-2022-39221 affects mcwebserver minecraft mod for fabric and quilt, mcwebserver minecraft mod for forge. Severity is high (CVSS 7.5). McWebserver mod runs a simple HTTP server alongside the Minecraft server in seperate threads. Path traversal in McWebserver Minecraft Mod for Fabric and Quilt up to and including 0.1.2.1 and McWebserver Minecraft Mod for Forge up to and inc
How urgent is CVE-2022-39221?
Priority 47/100. High severity; Remotely exploitable, no login, no user action