What’s Vulnerable › Vulnerabilities

CVE-2023-28163

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-02 · updated 2026-10-23
• Weakness: CWE-22

Description

When downloading files through the Save As dialog on Windows with suggested filenames containing environment variable names, Windows would have resolved those in the context of the current user. <br>*This bug only affects Firefox on Windows. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.

Affected products

• Mozilla Firefox: before 111.0 — fixed in 111.0
• Mozilla Firefox ESR: before 102.9 — fixed in 102.9
• Mozilla Thunderbird: before 102.9 — fixed in 102.9

How to fix

Upgrade to a fixed version: Mozilla Firefox 111.0; Mozilla Firefox ESR 102.9; Mozilla Thunderbird 102.9. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1817768
• https://www.mozilla.org/security/advisories/mfsa2023-09/
• https://www.mozilla.org/security/advisories/mfsa2023-10/
• https://www.mozilla.org/security/advisories/mfsa2023-11/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1817768
• https://www.mozilla.org/security/advisories/mfsa2023-09/
• https://www.mozilla.org/security/advisories/mfsa2023-10/
• https://www.mozilla.org/security/advisories/mfsa2023-11/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1817768

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