CVE-2025-8042 json
Sandboxed iframe could start downloads
published 2025-08-19 14 mo ago modified 2026-09-30 39 d ago also EUVD-2025-25232
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. This vulnerability was fixed in Firefox 141.
Patch / fix
- mozilla firefox 141
- firefox-esr openSUSE Tumbleweed 153.0-1.1
- MozillaFirefox openSUSE Tumbleweed 141.0-1.1
opensuse advisories openSUSE-SU-2026:11373-1openSUSE-SU-2025:15386-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 14 mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Mozilla Firefox
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
mozilla.org
/security/advisories/mfsa2025-56/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1791322
issue-tracking, permissions-required
Sources
- CVE List CVE-2025-8042
- NVD CVE-2025-8042
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.