PatchTheCVECVE-2021-21269: Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server
CVE-2021-21269 is a high-severity flaw (CVSS 7.7) affecting keymaker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server. In Keymaker before version 0.2.0, the assets endpoint did not check for the extension. The rust `join` method without checking user input might have made it abe to do a Path Traversal attack causing to read more files than allowed. This is fixed in version 0.2.0.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.7 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.4% (top 27%) |
| CISA exploited list | No |
| Weakness | CWE-22 |
| Published | 2021-01-20 |
| 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-2021-21269?
keymaker: upgrade to 0.2.0. Exact commands for each OS are on this page.
Is CVE-2021-21269 being exploited?
CVE-2021-21269 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-2021-21269 affect?
CVE-2021-21269 affects keymaker. Severity is high (CVSS 7.7). Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server. In Keymaker before version 0.2.0, the assets endpoint did not check for the extension. The rust `join` method without checking user input might have made
How urgent is CVE-2021-21269?
Priority 45/100. High severity