Read the docs
TI-2020-12323 Aliases CVE-2020-15648GHSA-jrmg-2w74-rwc9

Clickjacking in Mozilla Thunderbird

Priority LOW 31CWE-1021Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 9 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-1021.

Summary

Using object or embed tags, it was possible to frame other websites, even if they disallowed framing using the X-Frame-Options header. This vulnerability affects Thunderbird < 78 and Firefox < 78.0.2.

Why it matters now

EPSS 0.01142 66th percentileScored 2026-11-07
Fix Partial Thunderbird (Mozilla): 78Firefox (Mozilla): 78.0.2Red Hat: 4 advisoriesRed Hat: 9 fixed, 2 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 7878Patch availableCNA
MozillaFirefoxbefore 78.0.278.0.2Patch availableCNA
  • Thunderbird VendorMozilla Affected before 78 Fixed in 78 Patch available CNA
  • Firefox VendorMozilla Affected before 78.0.2 Fixed in 78.0.2 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 78.0.2VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 78.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 78.0.2 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 78.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 78
  • Fix · CNA Firefox (Mozilla) Fixed in 78.0.2

Red Hat 4 advisories

  • RHSA-2020:4080 Released 2020-09-30 · Red Hat rating Important
    firefox security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) firefox-78.3.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-78.3.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-78.3.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-78.3.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-78.3.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-78.3.0-1.el7_9
  • RHSA-2020:3559 Released 2020-08-26 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) firefox-78.2.0-3.el8_1
  • RHSA-2020:3557 Released 2020-08-26 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-78.2.0-2.el8_2
Show 1 more Red Hat advisories
  • RHSA-2020:3555 Released 2020-08-26 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox-78.2.0-3.el8_0

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:3557
Red Hat Enterprise Linux AppStream E4S (v. 8.0)Fixed RHSA-2020:3555
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2020:3559
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:4080
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:4080
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:4080
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:4080
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:4080
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:4080

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15648
  2. 2026-10-03 Alias added: GHSA-jrmg-2w74-rwc9

References

Advisory 3

  • 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