High 8.1Published Jun 2, 2023

CVE-2023-25734After downloading a Windows <code>.url</code> shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system.

Updated under an hour ago (Oct 27, 2026, 8:40 PM ET)

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It affects mozilla firefox and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

After downloading a Windows <code>.url</code> shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resource.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

CVSS: 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-601
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 110.0	NVD
mozilla firefox_esr mozilla:firefox_esr	before 102.8	NVD
mozilla thunderbird mozilla:thunderbird	before 102.8	NVD

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1784451	exploit, issue-tracking, vendor-advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1809923	issue-tracking, permissions-required
https://bugzilla.mozilla.org/show_bug.cgi?id=1810143	issue-tracking, permissions-required
https://bugzilla.mozilla.org/show_bug.cgi?id=1812338	issue-tracking, permissions-required
https://www.mozilla.org/security/advisories/mfsa2023-05/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-06/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-07/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.