CVE-2021-23976 is a high-severity vulnerability affecting Firefox for Android versions prior to 86. It allowed malicious Android applications to provide arbitrary webapp manifests, leading to UI spoofing through fullscreen access and potential cross-origin attacks. The vulnerability has a CVSS score of 8.1, indicating a high impact on confidentiality and integrity with low attack complexity, requiring user interaction. While not listed in CISA's KEV catalog and lacking public exploit code, it has garnered some community discussion and media coverage, suggesting awareness of its potential.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 86.0CPE matchmatch criteria | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.