TI-2017-03449 Aliases CVE-2017-5421 GHSA-96f5-c797-v39q

Improper input validation in Mozilla Firefox

LOW 37CWE-20Published 2018-06-11 · Updated 2024-08-05

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

A malicious site could spoof the contents of the print preview window if popup windows are enabled, resulting in user confusion of what site is currently loaded. This vulnerability affects Firefox < 52 and Thunderbird < 52.

Why it matters now

EPSS 0.01883 79th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed Firefox (Mozilla): 52Thunderbird (Mozilla): 52

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox	before 52	52	Patch available	CNA
Mozilla	Thunderbird	before 52	52	Patch available	CNA

Firefox VendorMozilla Affected before 52 Fixed in 52 Patch available CNA
Thunderbird VendorMozilla Affected before 52 Fixed in 52 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 52.0.	Vulnerable	Mozilla
cpe:2.3:a:mozilla:thunderbird::::::::	before 52.0.	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 52.0. Vulnerable ·Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 52.0. Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 52
Fix · CNA Thunderbird (Mozilla) Fixed in 52

Fixed in the same release

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

Release · 2018-06-11
Mozilla Firefox 52
19 records Highest priority Priority MEDIUM 4 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2017-03441 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
- TI-2017-03427 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
- TI-2017-03431 Use after free in Mozilla FirefoxPriority MEDIUM 45
Show all 19 records →
Release · 2018-06-11
Mozilla Thunderbird 52
14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW
Other records, highest priority first
- TI-2017-03441 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
- TI-2017-03427 Memory corruption in Mozilla FirefoxPriority MEDIUM 46
- TI-2017-03431 Use after free in Mozilla FirefoxPriority MEDIUM 45
Show all 14 records →

Timeline

2026-10-02 Threatist record created from CVE-2017-5421
2026-10-03 Alias added: GHSA-96f5-c797-v39q

References

Exploit 1

https://bugzilla.mozilla.org/show_bug.cgi?id=1301876

Advisory 2

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