Cross-site scripting in Mozilla Firefox for iOS
Priority LOW 21CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26.
Why it matters now
EPSS 0.00791 56th percentileScored 2026-11-07
Fix Fixed Firefox for iOS (Mozilla): 26
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Firefox for iOS (Mozilla) Fixed in 26
Timeline
- 2026-10-02 Threatist record created from CVE-2020-12404
- 2026-10-03 Alias added: GHSA-5jfg-97qh-qq62
References
More Mozilla Firefox Mobile vulnerabilities
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2022-09831 Use after free in Mozilla Firefox KEVCVSS 3.1HIGH 8.8
- TI-2023-13905 Race condition in Mozilla Firefox for Android CVSS 3.1HIGH 7.5
- TI-2023-13916 A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization… CVSS 3.1MEDIUM 6.5
- TI-2023-13903 Following a Garbage Collector compaction, weak maps may have been accessed before they… CVSS 3.1MEDIUM 6.5
- TI-2022-13642 Information disclosure in Mozilla Firefox for iOS CVSS 3.1MEDIUM 6.5
Sources
- CVE-2020-12404 · CVE Program
- CVE-2020-12404 · NVD
- FIRST EPSS
- GHSA-5jfg-97qh-qq62 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences