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TI-2020-12330 Aliases CVE-2020-15655GHSA-xjqq-782m-q873

A redirected HTTP request which is observed or modified through a web extension could…

Priority LOW 32Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Why it matters now

EPSS 0.0152 74th percentileScored 2026-11-07
Fix Fixed Firefox ESR (Mozilla): 78.1Firefox (Mozilla): 79+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox ESRbefore 78.178.1Patch availableCNA
MozillaFirefoxbefore 7979Patch availableCNA
MozillaThunderbirdbefore 78.178.1Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 78.1 Fixed in 78.1 Patch available CNA
  • Firefox VendorMozilla Affected before 79 Fixed in 79 Patch available CNA
  • Thunderbird VendorMozilla Affected before 78.1 Fixed in 78.1 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 79.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 78.1VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 78.1VulnerableMozilla
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*15.2VulnerableopenSUSE
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*20.04VulnerableCanonical
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 79.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 78.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 78.1 Vulnerable ·Mozilla
  • cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 78.1
  • Fix · CNA Firefox (Mozilla) Fixed in 79
  • Fix · CNA Thunderbird (Mozilla) Fixed in 78.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 79

    8 records Highest priority Priority MEDIUM 2 MEDIUM, 6 LOW

    Other records, highest priority first

    • TI-2020-12334 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 43
    • TI-2020-12331 Type confusion in Mozilla Firefox ESRPriority MEDIUM 41
    • TI-2020-12332 Uncontrolled search path in Mozilla Firefox ESRPriority LOW 34
    Show all 8 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 78.1

    6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2020-12331 Type confusion in Mozilla Firefox ESRPriority MEDIUM 41
    • TI-2020-12332 Uncontrolled search path in Mozilla Firefox ESRPriority LOW 34
    • TI-2020-12333 Improper check for unusual conditions in Mozilla Firefox ESRPriority LOW 32
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15655
  2. 2026-10-03 Alias added: GHSA-xjqq-782m-q873

References

Advisory 6

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences