CVE-2021-29954

Name: CVE-2021-29954
Creator: NVD / NIST
Published: 2021-06-24T14:15:10.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2021-29954 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Proxy functionality built into Hubs Cloud’s Reticulum software allowed access to internal URLs, including the metadata service. This vulnerability affects Hubs Cloud < mozillareality/reticulum/1.0.1/20210428201255.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

Proxy functionality built into Hubs Cloud’s Reticulum software allowed access to internal URLs, including the metadata service. This vulnerability affects Hubs Cloud < mozillareality/reticulum/1.0.1/20210428201255.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.64%

46.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-312

Affected Software

Vendor	Product	Versions
Mozilla	Hubs Cloud Reticulum	< 1.0.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1707898Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-21/Release Notes, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1707898Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-21/Release Notes, Vendor Advisory

Timeline

Published: Jun 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29954?

How severe is CVE-2021-29954?

CVE-2021-29954 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29954?

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-2021-29954?

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

Scan your code now

Source: NVD / NIST