CVE-2025-8042
Sandboxed iframe could start downloads
9.8 Critical
Firefox for Android allowed a sandboxed iframe without the allow-downloads attribute to start downloads. This vulnerability was fixed in Firefox 141.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
0.50%Up 0.5 points since Aug 20, 2025
What each source reports
CVE List Score used
Sandboxed iframe could start downloads
Firefox for Android allowed a sandboxed iframe without the allow-downloads attribute to start downloads. This vulnerability was fixed in Firefox 141.
- Record
CVE-2025-8042- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-732
- Updated
- 2026-11-02
EUVDEUVD-2025-25232
Firefox for Android allowed a sandboxed iframe without the allow-downloads attribute to start downloads. This vulnerability was fixed in Firefox 141.
- Record
EUVD-2025-25232- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-86q6-8hr2-487f
Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start...
Firefox for Android allowed a sandboxed iframe without the allow-downloads attribute to start downloads. This vulnerability affects Firefox < 141.
- Record
GHSA-86q6-8hr2-487f- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-732
- Updated
- 2026-11-02
NVD
Firefox for Android allowed a sandboxed iframe without the allow-downloads attribute to start downloads. This vulnerability was fixed in Firefox 141.
- Record
CVE-2025-8042- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-732
- Updated
- 2026-11-02
OSVopenSUSE-SU-2025:15386-1 No score
MozillaFirefox-141.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-141.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:15386-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:11373-1 No score
firefox-esr-153.0-1.1 on GA media
These are all security issues fixed in the firefox-esr-153.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:11373-1- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-8042 No score
[Unknown description]
- Record
UBUNTU-CVE-2025-8042- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 18 CVEs |
before 141.0-1.1 | 141.0-1.1 |
firefox-esropenSUSE:Tumbleweed From an advisory covering 228 CVEs |
before 153.0-1.1 | 153.0-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-8042 is a critical vulnerability (CVSS 9.8) in Mozilla Firefox, published July 23, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 43rd percentile. No source names a fixed version.
References
bugzilla.mozilla.org/show_bug.cgi?id=1791322
mozilla.org/security/advisories/mfsa2025-56
nvd.nist.gov/vuln/detail/CVE-2025-8042
github.com/advisories/GHSA-86q6-8hr2-487f
ubuntu.com/security/CVE-2025-8042
cve.org/CVERecord?id=CVE-2025-8042
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suse.com/security/cve/CVE-2025-8027
This page doesn't list everything
Left out here: 49 references. The JSON record has them.