Vulnerability · Published Jun 24, 2021 · Assigned by mozilla
CVE-2021-23996
Medium 6.5
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.7%top 45.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
By utilizing 3D CSS in conjunction with Javascript, content could have been rendered outside the webpage's viewport, resulting in a spoofing attack that could have been used for phishing or other attacks on a user. This vulnerability affects Firefox < 88.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.21 | firefox | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.22 | firefox | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.23 | firefox | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.21 | librewolf | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.22 | librewolf | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.23 | librewolf | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Alpine:v3.24 | librewolf | 88.0-r0 | ALPINE-CVE-2021-23996 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2021-23996 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2021-16/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1701834 x_refsource_MISC