CVE-2020-12409 - When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL

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HIGH

When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL

Published Jul 9, 2020

8.8

HIGH

CVSS 3.1

EPSS 1.18%

Description

When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <77

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
unspecified	affected	<77

Remediation

No remediation recorded yet.

Weaknesses (0)

No CWE recorded.

References (2)

https://bugzilla.mozilla.org/show_bug.cgi?id=1629506
x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-20/
x_refsource_MISCVendor Advisory

Link	Providers	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1629506		x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-20/		x_refsource_MISCVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mozilla

Published Jul 9, 2020

Updated Aug 4, 2024

Reserved Apr 28, 2020

Link CVE-2020-12409

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-12409

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-12409