CVE-2021-22917

Name: CVE-2021-22917
Creator: NVD / NIST
Published: 2021-07-12T11:15:07.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2021-22917 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Brave Browser Desktop between versions 1.17 and 1.20 is vulnerable to information disclosure by way of DNS requests in Tor windows not flowing through Tor if adblocking was enabled.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

Brave Browser Desktop between versions 1.17 and 1.20 is vulnerable to information disclosure by way of DNS requests in Tor windows not flowing through Tor if adblocking was enabled.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Brave	Browser	> 1.17, < 1.20

References

https://hackerone.com/reports/1077022Third Party Advisory
https://hackerone.com/reports/1077022Third Party Advisory

Timeline

Published: Jul 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22917?

Brave Browser Desktop between versions 1.17 and 1.20 is vulnerable to information disclosure by way of DNS requests in Tor windows not flowing through Tor if adblocking was enabled.

How severe is CVE-2021-22917?

CVE-2021-22917 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22917?

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-2021-22917?

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

Scan your code now

Source: NVD / NIST