CVE-2021-21269

Name: CVE-2021-21269
Creator: NVD / NIST
Published: 2021-01-20T18:15:12.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.39%

Last modified Jun 17, 2026

CVE-2021-21269 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.39%

68.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Keymaker Project	Keymaker	< 0.2.0

References

https://github.com/keymaker-mx/keymaker/commit/63f3012b390ff1519a84100df9e5dff5058bb926Patch, Third Party Advisory
https://github.com/keymaker-mx/keymaker/security/advisories/GHSA-pg25-xfcf-vjvmThird Party Advisory
https://github.com/keymaker-mx/keymaker/commit/63f3012b390ff1519a84100df9e5dff5058bb926Patch, Third Party Advisory
https://github.com/keymaker-mx/keymaker/security/advisories/GHSA-pg25-xfcf-vjvmThird Party Advisory

Timeline

Published: Jan 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21269?

How severe is CVE-2021-21269?

CVE-2021-21269 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21269?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21269?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST