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NVD / CVE Program· CNA hackerone

CVE-2021-22929: An information disclosure exists in Brave Browser Desktop prior to version 1.28.62, where logged warning messages that included timestamps o

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.55% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: tor (openSUSE:Leap 15.2) 0.4.6.8-bp153.2.9.1; tor (openSUSE:Tumbleweed) 0.4.6.8-1.1; tor (SUSE:Package Hub 15 SP2) 0.4.6.8-bp152.2.18.1.

Low priority for now. Upgrade to tor (openSUSE:Leap 15.2) 0.4.6.8-bp153.2.9.1; tor (openSUSE:Tumbleweed) 0.4.6.8-1.1; tor (SUSE:Package Hub 15 SP2) 0.4.6.8-bp152.2.18.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An information disclosure exists in Brave Browser Desktop prior to version 1.28.62, where logged warning messages that included timestamps of connections to V2 onion domains in tor.log.

MediumCVSS 6.1 · v3.1—No exploit Fix available
Published
Aug 31, 2021
Updated
Jun 16, 2026
EPSS
0.5% · 46th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
bravebrave

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • brave bravebefore 1.28.62

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a https://github.com/brave/brave-core

    • 1.28.62affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.2torbefore 0.4.6.8-bp153.2.9.10.4.6.8-bp153.2.9.1
openSUSE:Tumbleweedtorbefore 0.4.6.8-1.10.4.6.8-1.1
SUSE:Package Hub 15 SP2torbefore 0.4.6.8-bp152.2.18.10.4.6.8-bp152.2.18.1
SUSE:Package Hub 15 SP3torbefore 0.4.6.8-bp153.2.9.10.4.6.8-bp153.2.9.1

Same product

brave: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-45884In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled,
    31Monitor
  • CVE-2022-47934Brave Browser before 1.43.88 allowed a remote attacker to cause a denial of service in private and guest windows via a crafted HTML file tha
    26Monitor
  • CVE-2022-47933Brave Browser before 1.42.51 allowed a remote attacker to cause a denial of service via a crafted HTML file that references the IPFS scheme.
    26Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-21323Feb 23, 2021 · Regression in DNS leakage from Tor windows
    22Monitor
  • ← EarlierCVE-2021-22916Jul 12, 2021 · In Brave Desktop between versions 1.17 and 1.26.60, when adblocking is enabled and a proxy browser extension is installed, the CNAME adblock
    24Monitor
  • Later →CVE-2022-30334May 7, 2022 · Brave before 1.34, when a Private Window with Tor Connectivity is used, leaks .onion URLs in Referer and Origin headers.
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
opensuse:tor0.4.6.8-bp153.2.9.1 · openSUSE:Leap 15.2Package registry (OSV)
suse:tor0.4.6.8-bp153.2.9.1 · SUSE:Package Hub 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-312 · Cleartext Storage of Sensitive Information

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

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