CVE-2021-29979

Name: CVE-2021-29979
Creator: NVD / NIST
Published: 2021-08-02T21:15:08.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2021-29979 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Hubs Cloud allows users to download shared content, specifically HTML and JS, which could allow javascript execution in the Hub Cloud instance’s primary hosting domain.*. This vulnerability affects Hubs Cloud < mozillareality/reticulum/1.0.1/20210618012634.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

Hubs Cloud allows users to download shared content, specifically HTML and JS, which could allow javascript execution in the Hub Cloud instance’s primary hosting domain.*. This vulnerability affects Hubs Cloud < mozillareality/reticulum/1.0.1/20210618012634.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.67%

47.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Hubs Cloud	All versions

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1712495Permissions Required
https://www.mozilla.org/security/advisories/mfsa2021-32/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1712495Permissions Required
https://www.mozilla.org/security/advisories/mfsa2021-32/Vendor Advisory

Timeline

Published: Aug 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29979?

How severe is CVE-2021-29979?

CVE-2021-29979 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29979?

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-2021-29979?

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

Scan your code now

Source: NVD / NIST