Vulnerability · Published Dec 22, 2022 · Assigned by mozilla
CVE-2021-4127
Critical 9.8
In plain English
A critical-severity security flaw in Firefox ESR from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.9%top 38.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | firefox-esr | 78.9.0esr-1 | DEBIAN-CVE-2021-4127 |
| Debian:13 | firefox-esr | 78.9.0esr-1 | DEBIAN-CVE-2021-4127 |
| Debian:14 | firefox-esr | 78.9.0esr-1 | DEBIAN-CVE-2021-4127 |
| Debian:12 | thunderbird | 1:78.9.0-1 | DEBIAN-CVE-2021-4127 |
| Debian:13 | thunderbird | 1:78.9.0-1 | DEBIAN-CVE-2021-4127 |
| Debian:14 | thunderbird | 1:78.9.0-1 | DEBIAN-CVE-2021-4127 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 78.9 |
| Mozilla | Firefox ESR | unspecified – before 78.9 |