CVE-2023-25734: mozilla firefox Open Redirect
Vulnerability summary
CVE-2023-25734 is a high (CVSS 8.1) Open Redirect vulnerability in mozilla firefox. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 7 · Related 7Timeline
- 02-06-2023PublishedVulnerability first disclosed.
- 09-01-2025Last modifiedVulnerability information updated.
Description
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 metrics
2 scores · 2 sources · 1 version- NVDNIST8.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.78%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
0.00 pp
From 0.78% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mozilla3 products
- firefox≥ unspecified, < 110 | < 110.0
- firefox_esr≥ unspecified, < 102.8 | < 102.8
- thunderbird≥ unspecified, < 102.8 | < 102.8
1 vendor · 3 products
References
7 links- www.mozilla.org/security/advisories/mfsa2023-06/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-05/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-07/Vendor Advisory