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TI-2022-13635 Aliases CVE-2022-31739GHSA-w6x2-rcr6-2hh6

When downloading files on Windows, the % character was not escaped, which could have lead…

Priority MEDIUM 41CWE-73Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

When downloading files on Windows, the % character was not escaped, which could have lead to a download incorrectly being saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%.<br>*This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00705 53rd percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 91.10Firefox (Mozilla): 101+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 91.1091.10Patch availableCNA
MozillaFirefoxbefore 101101Patch availableCNA
MozillaFirefox ESRbefore 91.1091.10Patch availableCNA
  • Thunderbird VendorMozilla Affected before 91.10 Fixed in 91.10 Patch available CNA
  • Firefox VendorMozilla Affected before 101 Fixed in 101 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 91.10 Fixed in 91.10 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 101VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 91.10VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.10VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 101 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.10 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.10 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.10
  • Fix · CNA Firefox (Mozilla) Fixed in 101
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.10

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 101

    12 records Highest priority Priority HIGH 2 HIGH, 10 MEDIUM

    Other records, highest priority first

    • TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
    • TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-13640 Cross-site scripting in Mozilla Firefox ESRPriority MEDIUM 62
    Show all 12 records →
  • Release ·

    Mozilla Thunderbird 91.10

    9 records Highest priority Priority HIGH 2 HIGH, 6 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
    • TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-13638 Observable discrepancy in Mozilla ThunderbirdPriority MEDIUM 62
    Show all 9 records →
Show 1 more group
  • Release ·

    Mozilla Firefox ESR 91.10

    8 records Highest priority Priority HIGH 2 HIGH, 6 MEDIUM

    Other records, highest priority first

    • TI-2022-13633 Out-of-bounds write in Mozilla ThunderbirdPriority HIGH 82
    • TI-2022-13637 Use of uninitialized resource in Mozilla ThunderbirdPriority HIGH 73
    • TI-2022-13638 Observable discrepancy in Mozilla ThunderbirdPriority MEDIUM 62
    Show all 8 records →

Vendor assessments

Red Hat

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

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-31739
  2. 2026-10-03 Alias added: GHSA-w6x2-rcr6-2hh6

References

Advisory 4

  • 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